Last year I filed with turbo tax, then got more tax documents. An accountant filed an amended return for me. So I don't want TurboTax to use info from last year.

It might not affect 2021 and be ok to transfer from the original return.  Or you can try to delete the transferred info.

There is a tricky way to clear out transferred info in the Online version.  But doing this will also clear out all your entries.  Go to Tax Tools > Tools > Transfer from your computer > Continue > then Continue without transferring.

Or you can just start a brand new account with a new username.  How to start another return in the Online version

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596