Why did it reject? A common reason is the wrong AGI. Do you need to change anything? Sorry you can't efile 2021 anymore, it's too late. You have to print and mail prior year returns.
How to Access prior year online returns
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/270...
If you can't get the side menus to open up to access the prior year..... You need to start entering some basic Personal Info in 2022 for the side menu to open up. Just continue a little ways into 2022. I had to go though about 12 screens.
Have you filed 2022 yet? When you efile 2022 you will need to enter 0 for the AGI since you are filing 2021 late.
