CRA has shut down for the roll over. Netfile will re-open and ready to accept TY24 and prior years on February 24, 2025.

Thanks for choosing TurboTax.

I assume that means you cannot 'refile' a previous year through netfile until feb 24th as well??

@LKAWA Yes, that's correct. However, depending on the change that you need to make, you might be able to do it through the Canada Revenue Agency's (CRA) MyAccount service. You can also fill out and mail a T1-ADJ T1 Adjustment Request.