After you file

I need to amend my 2020 return and change my filing status to MFS. I am using the online version of TT, and as of today, TT cannot amend the 2020 return because the IRS has not updated the relevant forms.

My questions (about how to proceed with the amended return in the future) are as follows:

1. should I efile the amended state return at the same time as the federal amended return? or should I hold on until the IRS responds to my amended federal return?

2. now that the filing status is changed to MFS, 2 separate returns will be required (the amended one for me, and a new MFS return for my wife). Does my wife have to submit her federal return before May 17 regardless of the approval status of my amended return? or does she have to wait for the IRS's response to my amended return first, then submit her own separate federal return?

3. when does my wife have to submit her state return?

Thanks for your feedback.