Explanation of changes and other important information
The explanation of changes section on your notice explains in detail the changes or corrections made to your tax return.
These changes are based on the information sent with your return and the information we have on file.
If, after reviewing your notice, you realize you have new or additional information you want to send in to change your return, see How to change your return.
If you disagree with your assessment or reassessment and want to register a formal dispute, see Complaints and disputes; you have 90 days from the date of the notice to register your dispute.
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