Filing

This CRA page tells you how you can change your 2021 tax return, as TurboTax Online 2021 is no longer available to do a ReFile with: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/change...   

You would also need to do a GST/HST return if you haven’t already done so. You would have to fill out and submit one through the Canada Revenue Agency (CRA) website. You can read more about it on this CRA page: https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4022/general-info...

If you are audited, just be sure to have all your receipts and other records ready. When the CRA does an audit they are just will double checking that what you have matches with what you have put on your tax return. You can read more about getting audited in this TurboTax article: https://turbotax.intuit.ca/tips/what-small-businesses-should-know-about-the-audit-process-6134