The Canada Revenue Agency will only accept one return per tax year. Once you’ve filed your return (mistakes and all), you can’t file a new one. But you can correct the original by way of an adjustment.
You must wait until you have received your Notice of Assessment before submitting any adjustment requests.
CRA has two ways for you to file an adjustment request – online or by mail. Online submissions are usually much quicker. The average processing time for CRA My Account adjustments is about two weeks. Adjustments filed by mail can take up to ten weeks to process.
- If you’re a CRA My Account holder, changes to your return can be submitted online via the portal. After signing into your account, click the “Change return” option from the left side. You’ll choose the tax year you want to adjust and enter line numbers and figures to correct or add information.
- If you prefer to submit your adjustment request by paper, fill out a Form T1ADJ – T1 Adjustment Request and mail to your local tax centre. Along with the completed form, you’ll also need to include any supporting documents (receipts, slips, etc.).
Once your adjustment request has been processed, you’ll receive a Notice of Reassessment which outlines approved changes. If your adjustment request is not approved, you’ll receive a letter of explanation from CRA.
For more information, click here.
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