---
title: "Diarise the assessment period for each federal return on the file"
url: "https://ailawframework.com/practice/taxation/diarise-the-amendment-period-for-each-assessment-on-the-file/united-states"
type: "task_jurisdiction_version"
site: "AI Law Framework"
id: "A26-X20261018-4-US"
practice_area: "Taxation"
tier: "yellow"
lawyer_review: "required"
jurisdictions: ["US"]
last_reviewed: "2026-10-22"
---

# Diarise the assessment period for each federal return on the file

> Extract the filing date of each return from the transcript and put it on a diary sheet, with a blank for the period the lawyer selects.

Canonical page: https://ailawframework.com/practice/taxation/diarise-the-amendment-period-for-each-assessment-on-the-file/united-states  
Last reviewed: 2026-10-22

Site index for agents: https://ailawframework.com/llms.txt

## Key facts

| Fact | Value |
| --- | --- |
| Practice area | [Taxation](https://ailawframework.com/practice/taxation.md) |
| Human involvement | Yellow: Lawyer and AI draft together |
| How AI is used | Extract the filing date of each return from the transcript and put it on a diary sheet, with a blank for the period the lawyer selects. |
| What the lawyer must review | 26 U.S.C. § 6501(a) generally requires assessment within 3 years after the return was filed. A false or fraudulent return with intent to evade tax, and a failure to file a return, may be assessed at any time. Where the omitted amount is more than 25 percent of the gross income stated in the return, § 6501(e) allows assessment within 6 years after the return was filed. A return filed early is treated as filed on the last day prescribed. You decide which subsection applies before a date is diarised or told to the client. OPR Issue 2026-19: do not rely on a generated legal conclusion. |
| Written for | United States |
| Applies to | [Diarise the amendment period for each assessment on the file](https://ailawframework.com/practice/taxation/diarise-the-amendment-period-for-each-assessment-on-the-file.md) |

## Checking plan

- What the AI does: Extract the filing date of each return from the transcript and put it on a diary sheet, with a blank for the period the lawyer selects.
- Basis: Checked against the linked sources on 22 October 2026. Confirm the current instrument before reliance.

## Notes

- Three years is the general rule only. Fraud, no return, listed transactions and international-information failures have their own rules in § 6501.
- A consent to extend the period is a signed document. You prepare it. The tool does not.

## Sources

- [26 U.S.C. § 6501, Limitations on assessment and collection](https://www.law.cornell.edu/uscode/text/26/6501) (checked 2026-10-22)
- [IRS Office of Professional Responsibility, Issue 2026-19](https://www.irs.gov/pub/opr-taxpros/issue-number-2026-19-introductory-guidelines-for-responsible-ai-use-in-federal-tax-practice.pdf) (checked 2026-10-22)

## Forms and precedents for this task

| Form or precedent | Kind | AI level | Summary |
| --- | --- | --- | --- |
| [Amendment period diary for an individual or a sole trader](https://ailawframework.com/precedents/taxation/amendment-period-diary.md) | Checklist | Yellow | A diary of the amendment period the Australian Taxation Office states for an individual, generally two years, and for a sole trader, two or four years depending on the income year. |

Signed-in accounts can read the full text of each one.

*Practice guidance for planning and review. Confirm current primary sources and the requirements of the actual matter. This is general information, not legal advice.*