IRS notice or assessment letter
Often the fastest way to see what the IRS says the charge was for.
Form 843 guide
Form 843 protective claim for IRS penalties and interest.
A Form 843 protective claim is often the filing path people review when they want to preserve a possible refund or abatement claim for IRS penalties or interest. The point is to preserve the issue before the deadline, not to pretend the refund is already guaranteed.
What it is
IRS form commonly used to request certain refunds or abatements for penalties, interest, fees, and additions to tax.
What it is not
Not an automatic refund ticket and not the right form for every tax issue.
Why it matters here
TAS says many taxpayers looking to preserve this issue will generally need to act by July 10, 2026.
Bottom line
Form 843 protective claim research usually starts after someone realizes a penalty or interest charge may have been affected by the COVID postponement window. If that is your situation, Form 843 is often the filing path people look at to preserve the issue while the legal posture remains unsettled.
Before this page is useful, know these basics
- Which taxpayer or entity the charge belongs to
- Which tax year, quarter, or filing period is involved
- Whether the charge was a penalty, interest, or another related amount
- Whether the amount was already paid, still open, or partially paid
What Form 843 does
The IRS says Form 843 is used to claim a refund or request an abatement of certain taxes, penalties, additions to tax, interest, and fees. For this issue, the most relevant use case is usually penalties or interest tied to filing or payment deadlines.
The important distinction is that the form is a claim mechanism. It helps preserve a refund or abatement request. It does not make the underlying legal issue final on its own.
Technical note: The IRS instructions also make clear that Form 843 is not the right form for every tax situation. The tax type and issue still matter.
Why people are talking about a protective claim
The Taxpayer Advocate Service says many taxpayers looking at the Kwong-related issue will generally need to file a claim by July 10, 2026, and should consider a protective claim because the issue is still being litigated.
A protective claim is mainly about preserving your rights while the law is still uncertain. TAS explains that a valid protective claim does not need a final dollar amount, but it does need to identify the contingency and the specific year or years involved.
What a protective claim should usually identify
- The taxpayer or entity making the claim
- The tax year, quarter, or filing period involved
- The penalty, interest, or related charge being challenged
- Why the claim depends on the unresolved COVID-postponement / Kwong issue
What to gather before you even think about filing
Do not start with the form if you do not yet know the basic facts. Start with the records that let you identify the charge cleanly.
Account transcript
Best first record for assessment timing, payments, and adjustments.
Filed return copy
Useful for confirming which return or form was involved.
Proof of payment
Important if the amount was already paid and the claim is refund-oriented.
Can you file Form 843 online?
Not for this use case. The Taxpayer Advocate Service says taxpayers generally need to file Form 843 on paper when preserving this kind of claim.
That also means recordkeeping matters. Keep a full copy of what you send, including attachments, and keep proof of mailing if you decide to file.
Technical note: The IRS instructions say the mailing address can depend on the type of tax or notice involved, so the right destination is not always identical across cases.
When to get help sooner
- The taxpayer is a business, partnership, S corporation, estate, or trust
- The issue involves payroll taxes or multiple tax modules
- The entity is closed, sold, or has multiple owners
- You are already in audit, Appeals, collection, or litigation
- You cannot tell which form, period, or charge the notice relates to