Because you did not use the Standard Mileage Rate by the due date of your 2021 return, you no longer have the option to use the Standard Mileage Rate (however, if you filed an extension for 2021, you may still have the option if you follow certain procedures).
And 2021 is year 1 for depreciation. So your 2022 return will show the second year of depreciation.
As for TurboTax online, I don't think it is able to do 2021 returns anymore (I think it shut down in October). I think if you use TurboTax, you can only use the CD/downloaded version now.
