You must mean 2021 for the year ending 12/31/2021 that you file in 2022. In 2023 we file for 2022. I think a post above says how to file 2021.
Did you start it last year? How to finish a return you started online,
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
Sorry it's too,late to start a 2021 online return or use the mobile app, either on Turbo Tax or the IRS. And too late to efile 2021
If you need to start 2021 you can buy the Desktop download here,
TurboTax 2021 Prior Year Tax Prep - File Past Years' Taxes
You will need a full Windows or Mac to install it on.
