People think of a tax year as one debt. The IRS does not. On your account transcript, a single year can show the tax from your original return, more tax from an amended return, more tax from an audit, and penalties and interest stacked on each. Each of those is its own assessment with its own date.

That matters in bankruptcy because one of the three timing rules runs from the assessment date, not from the return.

Which clocks move and which do not

RuleWhat starts the clockDoes an audit or amended return restart it?
3-year rule, § 507(a)(8)(A)(i)The date the return was last due, including extensionsNo. The due date of the year's return does not change.
2-year rule, § 523(a)(1)(B)(ii)The date you filed the required return, if lateTied to when the required return was filed. Do not assume an amended return changes it.
240-day rule, § 507(a)(8)(A)(ii)The date the tax was assessedYes, for the additional amount. Each new assessment has its own 240 days.

So the 3-year rule looks at the year. The 240-day rule looks at each assessment. If you have an older year with a recent audit adjustment, you can end up with part of that year dischargeable and part of it not.

Example: one year, two answers

Say your return for a year was filed on time and the tax was assessed shortly after. More than three years have passed since the due date, and the original assessment is well over 240 days old. On those facts, the original balance can pass all three timing tests.

Now suppose the IRS audited that year and assessed additional tax four months ago. That additional tax is still inside its 240-day window. If you filed today, the audit portion would be a priority claim and nondischargeable under § 523(a)(1)(A), while the original balance could be discharged. Wait until the audit assessment passes 240 days (plus any tolling) and the whole year may qualify. Run your dates through our discharge calculator, then check each assessment line separately.

Amended returns: you are starting the clock yourself

When you file a Form 1040-X showing more tax, the IRS generally assesses the additional amount when it processes the return. That processing date, not the date you mailed it, is what starts the 240-day count for the new amount. Processing can take months, so you do not control the exact date.

A few things to know:

  • Filing an amended return close to a bankruptcy can work against you. If the new assessment lands inside 240 days of your petition, that slice is not dischargeable.
  • It can also extend the IRS's assessment window. Under IRC § 6501(c)(7), if the IRS receives a signed document showing additional tax within the last 60 days of the assessment period, it gets at least 60 more days to assess that amount.
  • It does not reset the 3-year rule. That clock runs from the original due date of the year's return.

None of this means you should avoid fixing a wrong return. Filing a knowingly false return to keep a year clean is how people end up in fraud and evasion territory, where no clock helps. It means timing the bankruptcy around the new assessment.

Audits: the 90-day letter delays the assessment

Audit adjustments to income tax are usually assessed through deficiency procedures. Under IRC § 6213(a), the IRS generally cannot assess a deficiency until it mails a notice of deficiency and the 90-day period to petition the Tax Court runs out, or, if you petition, until the Tax Court decision becomes final. That means the audit assessment date is often many months after the audit itself wraps up.

If you have an audit open, or a notice of deficiency in hand, the additional tax has not been assessed yet. That is a different category: unassessed but assessable tax under § 507(a)(8)(A)(iii), which is priority and nondischargeable if it is still assessable when you file. We cover that in unassessed taxes and priority.

Filing bankruptcy in the middle of an audit

The automatic stay does not freeze an audit. Section 362(b)(9) lets the IRS continue an audit, issue a notice of deficiency, demand returns, and make an assessment while your case is open. What the stay does do, under § 362(a)(8), is stop you (an individual) from starting or continuing a Tax Court case for pre-bankruptcy years, and IRC § 6213(f)(1) suspends the 90-day petition period while you are barred, plus 60 days.

There is another option. Under § 505, the bankruptcy court can determine the amount of a tax. If an audit result is wrong, that can be a way to fight it inside the bankruptcy instead of in Tax Court. See Section 505.

How long can the IRS keep adding to an old year?

The general rule under IRC § 6501(a) is three years from when the return was filed. It stretches to six years under § 6501(e) for a substantial omission of income, and there is no limit for a fraudulent return or no return at all under § 6501(c). You can also agree to extend it in writing under § 6501(c)(4), usually on Form 872, which IRS examiners often ask for during an audit.

Signing that extension keeps the year open for more assessments. In bankruptcy terms, that keeps the potential audit tax "assessable by agreement," which is exactly the language in § 507(a)(8)(A)(iii).

Warning: Do not read the balance due on an IRS notice as one number with one date. Pull the account transcript and look for each separate assessment line. A recent audit or amended return assessment can sink an otherwise perfect filing date.

Practical steps

  1. Get account transcripts for every year you owe and list every assessment date, not just the first one.
  2. Note any open audits, signed Form 872 extensions, or notices of deficiency.
  3. If you plan to amend a return, decide with counsel whether to amend before or after you file, and how that lands against the 240-day count.
  4. Check for tolling events, such as an offer in compromise or prior bankruptcy, that add time to the 240-day period. See how the lookback periods get stretched.

For the plain-English version of how all three timing rules work together, see the 3-year, 2-year, 240-day rule explained.

If an audit or amended return is in the picture, call (813) 229-7100 and have Darrin T. Mish, a tax attorney, line up every assessment date before you pick a filing date. Every case turns on its own transcripts and dates; this page is general information, not legal advice for your situation. One tax year can have three different answers, and you want to know all of them.