It is showing that the 2021 amended form is available now.  

For TurboTax Online, simply log in to your account and select “Amend a return that was filed and accepted.” If you used our CD/download product, sign back into your return and select “Amend a filed return.” You must file a separate Form 1040-X for each tax return you are amending.

How to File an Amended Tax Return with the IRS

https://turbotax.intuit.com/tax-tips/amend-return/how-to-file-an-amended-return-with-the-irs/L6kO691...

I need to amend my state return

https://ttlc.intuit.com/community/amending/help/i-need-to-amend-my-state-return/00/26510#:~:text=Tur....