If I made a mistake in my beginning inventory of 2022, can I adjust it on my 2023 tax return?

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Unfortunately,  you will need to make adjustments on your 2022 tax return. Per the CRA, You can request a change to your tax return by amending specific line(s) of your return. 

We can certainly help you make adjustment to your 2022 tax return already submitted. Please read this great TurboTax guide to learn how.

Thank you for choosing TurboTax.