Form 843 Protective Claim Mechanics: Line 3, Treas. Reg. § 301.6402-2(b)(1), and the Refund-vs-Abatement Distinction | Special Deadline is July 10, 2026 |

by | May 17, 2026 | Sheepdog Tax Resolution Daily | 0 comments

A protective claim is a procedural posture, not a separate document type. The vehicle for a Kwong v. United States protective claim, penalties and interest assessed off original (pre-postponement) due dates falling inside the COVID disaster window, is Form 843, the standard IRS Claim for Refund and Request for Abatement. The protective framing is conveyed through the regulatory citation, the explanation in Line 8, and the attached statement that recites the grounds and reserves the taxpayer’s right to recompute. This piece walks through how the form is actually completed for a protective Kwong filing, which lines control, which lines are commonly misused, and which procedural details are non-negotiable.

The two regulations doing the work

Treas. Reg. § 301.6402-2 controls the formal sufficiency of any refund claim. Two of its subsections matter here.

§ 301.6402-2(b)(2), formal sufficiency requirements. A claim must (i) identify the taxpayer, (ii) identify the type of tax, (iii) identify the tax period at issue, (iv) state the amount of the claim (or the basis on which the amount will be computed), (v) state the grounds, and (vi) be filed within the IRC § 6511 limitations period. A claim that omits any of these elements is not a claim, it is correspondence. The IRS may treat it as a constructive denial under IRC § 6532 timeframes, or simply ignore it.

§ 301.6402-2(b)(1), the protective-claim provision. A claim may be filed where the right to refund or abatement is contingent on future events, typically the resolution of unsettled litigation, the issuance of pending IRS guidance, or the development of contested administrative facts. A protective claim under (b)(1) still must satisfy the (b)(2) formal-sufficiency requirements. The protective framing affects what goes in the “amount” field (a reasonable estimate or “to be determined” formulation, rather than a final liquidated number) and what goes in the “grounds” field (a citation to the contingency and the taxpayer’s election to preserve rights pending resolution).

For Kwong protective claims, the contingency is whether the IRS will administratively adopt the Kwong postponement reading and recompute penalties assessed off pre-postponement due dates. As of this writing, the IRS has not issued definitive administrative guidance. The TAS NTA Blog (Parts I and III) flags the issue and recommends protective filings. The protective claim is the procedural mechanism for preserving the right while the contingency resolves.

Refund vs abatement, the field that drives the form

Form 843 covers both refund of paid amounts and abatement of assessed-but-unpaid amounts. The distinction matters because the same form serves two different reliefs:

  • Refund. The taxpayer paid an assessed amount (penalty, interest, or addition to tax). The taxpayer now claims back amounts paid. The Form 843 requests refund.
  • Abatement. The IRS has assessed an amount but the taxpayer has not yet paid it. The taxpayer now claims relief from the assessment. The Form 843 requests abatement.

For a Kwong protective claim, a single tax year may carry both, some penalties or interest amounts may have been paid, others may sit unpaid on the account transcript. The Form 843 can request both in the same filing. The Line 8 explanation should be explicit: the claim covers all penalties and interest within scope, both paid (refund posture) and unpaid (abatement posture).

Control point, paid vs unpaid scoping.

1. Pull the IRS account transcript for the year. Identify each penalty (TC 166, 170, 176, 276) and interest (TC 196) assessment.

2. For each, determine whether the amount has been paid (look for TC 670 / TC 706 / similar payment posts) or sits as an open assessment.

3. The protective claim’s scope is all of them, regardless of paid/unpaid status. The recovery mechanism (refund check vs balance abatement) follows the paid/unpaid distinction.

Line-by-line completion for a Kwong protective claim

What follows assumes Form 843 (Rev. December 2024), the current version. Older revisions may differ in field numbering.

Top reason checkbox

Check Abatement or refund of a penalty or addition to tax due to reasonable cause or other reason allowed under the law (Penalty section, first sub-option). The Kwong protective theory is a reasonable-cause / allowed-under-the-law claim, the law in question being IRC § 7508A(d) as interpreted by Kwong. Do not check any of the other top-reason boxes (those are for non-penalty reliefs that do not apply here).

Identification block

  • Name of person requesting: the taxpayer’s name as it appears on the return for the year at issue
  • SSN: the taxpayer’s SSN
  • Spouse name and Spouse SSN: filled only if the year is a joint-return year AND filed-return spouse identification is available. If the year was a joint-return year but the former spouse is unavailable, leave these fields blank and rely on the attached statement to recite the one-spouse-unavailable circumstance (see Kwong IV for the joint-year deep-dive)
  • Address: the taxpayer’s current mailing address
  • Daytime telephone number: taxpayer’s daytime phone

Line 1, Tax period

Enter the tax year as MM/DD/YYYY to MM/DD/YYYY covering the full calendar year. For tax year 2018, enter 01/01/2018 begin and 12/31/2018 end. One Form 843 per tax year, a five-year Kwong posture requires five separate forms.

Line 2, Amount to be refunded or abated

Leave blank for a protective claim under § 301.6402-2(b)(1). The amount is “to be determined” pending the contingency. The attached statement recites the basis on which the amount will be computed (recomputation of penalties and interest under the Kwong postponement theory against the affected transcript entries). Some practitioners enter PROTECTIVE — see attached statement in Line 2; that’s defensible but non-standard. Blank with the explanation in Line 8 and the attached statement is the cleanest posture.

Line 3, Date(s) of payment(s)

This is the line that’s most often misused. The Form 843 instructions are explicit: “If you are requesting a refund of payments you have already made, enter the date of each payment.” Line 3 is for actual payment dates. Nothing else.

Three rules:

  1. For an abatement claim of an unpaid assessment, leave Line 3 entirely blank. The Form 843 instructions confirm this, Line 3 is for refund-of-payments-made. There is no payment to date; the line is irrelevant.
  1. For a refund claim where the taxpayer has paid the assessment, enter the actual payment date(s). If the taxpayer paid the penalty on March 12, 2022, enter 03/12/2022. The columns labeled a through l accommodate up to 12 separate payment dates per Form 843; attach additional sheets if needed.
  1. For a mixed protective claim (some paid, some unpaid), the cleanest practice is to leave Line 3 blank and use the attached statement to identify the transcript entries by date and TC code, distinguishing paid from unpaid. This avoids any ambiguity about whether the listed dates are payment dates or assessment dates, they are different things.

Control point, Line 3 things not to do.

1. Do not enter PROTECTIVE or TBD or N/A or see attached in the date columns. The columns are for date values only. A status notation in those columns is a clerical defect that risks IRS service-center confusion.

2. Do not enter the IRS assessment date (the date the IRS posted the TC 166 / TC 196 / etc. to the account transcript). That is not a payment date; the line does not ask for it.

3. Do not enter the original return due date. Same reason.

Line 4, Type of tax or fee

Check e. Income for individual income tax penalties. This is the most common box for Kwong protective claims. Other boxes apply to other tax types (estate, gift, excise, employment, civil penalty, fee) and are not relevant to the typical individual-income Kwong fact pattern.

Line 5, Type of return filed

Check i. 1040 for an individual income tax return. This is the second of two type-of-tax indicators. The Form 843 service center routes the form based on the combination of Line 4 and Line 5; an incorrect mark on either line can route the form to the wrong unit and add weeks to processing.

Line 6, Internal Revenue Code section

Enter the IRC section(s) on which the penalty assessment is based. For a typical Kwong protective claim covering the three most common penalty types:

  • § 6651(a)(1), failure to file
  • § 6651(a)(2), failure to pay
  • § 6654, underpayment of estimated tax (for years where TC 170 or TC 176 appears)

A single Form 843 covers all penalties assessed for the year at issue under the listed IRC sections. List all sections that apply for that year, if the year has both a TC 166 (failure to file) and TC 276 (failure to pay) and TC 170 (estimated tax), enter 6651(a)(1), 6651(a)(2), 6654. If only some sections apply, list only those.

Line 7, Reason for request

Check c. Reasonable cause or other reason allowed under the law can be shown. The Kwong protective theory rests on the “other reason allowed under the law” prong, specifically IRC § 7508A(d) as interpreted by Kwong. The reasonable-cause prong is also defensible as a backup posture. Do not check 7a or 7b; those are for unrelated reliefs (interest from IRS error, erroneous written advice).

Line 8, Explanation

This is where the protective framing goes. The Line 8 explanation should reference the attached statement, identify the regulatory basis, and identify the controlling reasoning. A workable Line 8 reads:

See attached Protective Statement filed under Treas. Reg. § 301.6402-2(b)(1). This filing seeks abatement of assessed-but-unpaid penalties and related interest and, to the extent any amounts have been paid or credited, refund of those amounts. Exact dollar amount is not yet fixed because the Kwong issue remains unsettled.

The Line 8 field is small. Detail goes in the attached statement, not the Line 8 box. The Line 8 explanation’s job is to point to the attached statement and identify the regulatory framework, that’s all.

Taxpayer signature

Sign in wet ink. Form 843 is not on the IRM 10.10.1 permanent e-signature list. Typed signatures, scanned image signatures, and electronic signatures of any flavor are not accepted on a Form 843 mailed cold to a service center as a fresh protective claim. The signature must be applied to the printed paper form by the taxpayer’s hand.

For joint-return years where the former spouse is unavailable (see Kwong IV), the second spouse signature line stays blank and the attached statement recites the unavailable-spouse circumstance.

Paid Preparer Use Only block

The paid preparer (a CPA, EA, or attorney with PTIN) completes the Paid Preparer Use Only block at the bottom of page 2. Required fields:

  • Print/type preparer’s name
  • Preparer’s signature (wet ink, same constraint as taxpayer)
  • Date (added at the time of wet-ink signature)
  • PTIN
  • Firm’s name
  • Firm’s EIN
  • Firm’s address
  • Phone
  • Check the “self-employed” box if the preparer is a sole proprietor or single-member LLC operating under self-employment status

The attached Protective Statement

Form 843 alone does not satisfy Treas. Reg. § 301.6402-2(b)(2) for a Kwong protective claim. The attached statement carries the substance. A workable structure:

  1. Header. Protective Form 843 Statement — Tax Year [YYYY] with the taxpayer’s name.
  2. Claim basis line. Cite the controlling authority: Kwong v. United States, 179 Fed. Cl. 382 (Fed. Cl. 2025); IRC § 7508A(d); Treas. Reg. § 301.6402-2(b)(1).
  3. Summary paragraph. One-paragraph description of the year and why it is in scope, typically referencing the original return due date and how it sits inside the COVID postponement window.
  4. Body of the claim. Two to four paragraphs walking through (a) the protective-claim framing, (b) the refund-and-abatement scope, (c) the reservation of rights pending the Kwong contingency, and (d) for joint-return years, the one-spouse-unavailable reservation language.
  5. Transcript entries identified. A clean list of the affected transcript entries, date, TC code, amount, brief description. This is the IRS examiner’s quick reference for what the claim actually targets. Pull these from the IRS account transcript for the year.
  6. Submission notes. Year-specific notes, anything unusual about the year’s posture, reversed penalties not in scope, ambiguous payment-history items, etc.
  7. Mailing address. Recite the IRS service-center mailing address. Confirm certified mail with return receipt.
  8. Preparer identification. Include the preparer’s identifying fields in the Paid Preparer Use Only block, but do not add a narrative byline to the protective statement itself.

The statement should not exceed two pages. A four-page statement signals that the protective filing is trying to litigate the case rather than preserve the right; that’s the wrong posture for § 301.6402-2(b)(1).

Wet-ink signatures and IRC § 7502 mailing

Form 843 is not on the IRS permanent e-signature list under IRM 10.10.1. The IRS made digital and image-of-signature acceptance permanent for a defined list of forms in October 2023; Form 843 did not make the cut. The default rule applies: handwritten (wet-ink) signature is required.

The narrow exception under IRM 10.10.1 for IRS personnel working person-to-person with a taxpayer on an open matter (a revenue officer, examiner, appeals officer) does not apply to fresh protective filings mailed cold to a service center. The exception requires an existing IRS-side open matter and a person-to-person posture with that matter’s assigned employee.

The certified-mail postmark date controls timely filing under IRC § 7502. Mail by certified mail, return receipt requested. The postmark date is the filing date. The return receipt provides documentation that the service center took delivery. Retain both.

For a five-year Kwong filing (2018-2022) for a single taxpayer, that means five separate packets, five separate Forms 843, five separate attached statements, five separate certified-mail mailings, and five separate return receipts. Each year is procedurally independent.

Service-center routing

The Form 843 mailing address is the IRS service center where the taxpayer would file the current-year Form 1040. The relevant determinant is the taxpayer’s domicile (the state where the taxpayer files as a resident), not the mailing-service or PMB address that appears on the return.

For a Nevada-domiciled taxpayer not enclosing payment, the address is:

Department of the Treasury
Internal Revenue Service
Ogden, UT 84201-0002

For a New York-domiciled taxpayer not enclosing payment:

Department of the Treasury
Internal Revenue Service
Kansas City, MO 64999-0002

Other states follow the standard Form 1040 where-to-file schedule (published annually in the Form 1040 instructions). Verify the taxpayer’s current-year filing-state position before mailing, a taxpayer who has moved between when the affected years were filed and the present may need a different service-center address than the one shown on the historical returns.

Common drafting errors

The Line 3 trap. Already discussed. Putting PROTECTIVE — TBD in the date columns is a clerical defect that risks routing or processing problems. Leave the line blank.

Wrong top-reason checkbox. Some practitioners check the “Abatement or refund under section 6404(f) of a penalty or addition to tax attributable to erroneous written advice by the IRS” box because it looks similar. It is not, § 6404(f) is a narrow remedy for IRS-written-advice errors. The Kwong theory is not § 6404(f); it is reasonable-cause-or-other-reason-allowed-under-the-law.

Wrong Line 5 selection. Some practitioners check 706 (Estate) instead of 1040 (Individual income) because the boxes are visually close on the form. The wrong selection routes the claim to the wrong IRS service-center unit and adds processing time.

Bundling multiple years on a single Form 843. Form 843 instructions require a separate form for each tax period. A five-year posture requires five separate Forms 843.

Skipping the attached statement. A Form 843 with the Line 8 box marked “see attached” and no attached statement is not a valid protective claim. The statement is substantive, it is where the (b)(2) formal-sufficiency requirements are satisfied.

Using an e-signature. Form 843 not on IRM 10.10.1 permanent list. Wet ink required.

Mailing first-class instead of certified. First-class mail does not establish the IRC § 7502 timely-mailing date. If the IRS contests timeliness, first-class mail has no defense. Certified mail with return receipt requested is the conservative method.

Missing the IRC § 6511 limitations period. Even with the Kwong postponement theory, IRC § 6511 controls the outer limitations boundary. The protective claim must be filed by the operative deadline (July 10, 2026 per TAS guidance), or the underlying refund-and-abatement rights are lost regardless of the substantive merits.

Closing, what a clean protective filing looks like

Control point, Form 843 protective filing readiness.

1. The top-reason checkbox marks Penalty / reasonable cause or other reason allowed under the law.

2. Identification fields list the taxpayer’s name, current SSN, and current address. Spouse fields are filled only for joint-return years where filed-return spouse identification is available.

3. Line 1 covers a single tax year (begin and end dates within the same calendar year).

4. Line 2 is blank. Line 3 is blank.

5. Line 4 marks Income. Line 5 marks 1040.

6. Line 6 lists the IRC sections that match the year’s penalty assessments.

7. Line 7 marks Reasonable cause or other reason allowed under the law.

8. Line 8 explanation references Treas. Reg. § 301.6402-2(b)(1) and the attached statement.

9. Taxpayer signature is wet ink. Paid preparer signature is wet ink.

10. Attached statement covers the eight-section structure above.

11. Mailing is certified mail, return receipt requested, to the correct service center for the taxpayer’s current domicile.

12. Postmark date is on or before July 10, 2026.

A protective Form 843 packet that satisfies all twelve points satisfies Treas. Reg. § 301.6402-2(b)(1) and (b)(2). A packet missing any of them is at risk of clerical rejection, routing error, or processing delay, and may end up costing the taxpayer the refund or abatement right entirely if the deficiency is not caught before the IRC § 6511 boundary closes.

Article authority anchors: Treas. Reg. § 301.6402-2(a), (b)(1), (b)(2); IRC §§ 6402, 6511, 6651, 6654, 7502, 7508A(d); Form 843 instructions (Rev. Dec 2024); IRM 10.10.1 (e-signature program, Form 843 not on permanent list); IRM 21.5.3 (claim processing); Kwong v. United States, 179 Fed. Cl. 382 (Fed. Cl. 2025); IRS Form 1040 where-to-file schedule (2026); National Taxpayer Advocate blog Parts I and III on COVID-era disaster-relief refund claims.

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