Updated because I can't see how to delete the original: Thanks for the explanation. I understand that after the forms are delayed by federal and/or state agencies, it takes time to have it available within the Turbo Tax program - tax returns are complicated and you can't just stick a new form in without a lot of editing and testing of the software. Thanks for your work.
Original: When I check the FTB site for forms, the 2021 form 3801 is available now. It says nothing about waiting another month.
