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CRA notices explained

T2 notice of reassessment

CRA’s updated summary of a corporation’s T2 return after it has changed the return following the original assessment.

Corporate income tax

A plain explanation of a common CRA letter, checked against the Act and CRA’s own guidance.

4 min readUpdated October 4, 2026

The short version

Use these three points first.

01

CRA sends a reassessment only when it changes an assessed return.

02

Check whether the change reaches amounts carried to other years.

03

The 90-day objection period starts again from the reassessment.

In this guide

What it is

CRA sends a notice of reassessment when it makes changes to a return it has already assessed. The changes can come from CRA’s own review, an audit, or an adjustment you requested.

A reassessment can change the tax owing, including interest and penalties, or the refund. The notice summarizes the revised amounts and explains the changes.

What to check

Dates that matter

Objecting
A reassessment is an assessment for objection purposes. A corporation can serve a notice of objection on or before the day that is 90 days after the day the notice was sent.
Reassessment limits
CRA’s ability to reassess is generally limited to the normal reassessment period that began with the original notice of assessment: three years for a Canadian-controlled private corporation and four years for other corporations, with exceptions set out in the Act.

What to keep

  • The reassessment beside the original assessment and the return
  • Any proposal letter or correspondence that led to it
  • Your notes on what changed and why

In TaxDesk

TaxDesk files a reassessment to the company and tax year beside the original assessment, so both stay with the T2 they relate to. When it follows an audit, link it to the audit matter as the reassessment, and the matter keeps the letter, the proposal, and the outcome together.

See every CRA notice explained

Scope note. This page explains a CRA letter in general terms. It isn’t advice about your situation. Check the letter itself, and confirm the dates and your options with your accountant.

Continue the workflow

The next useful step

Put the guide into practice

Keep every CRA letter with the record it affects.

TaxDesk reads CRA notices, files them to the right company and year, and keeps them beside the filings and audit matters they relate to.