VolvoGirl
Level 15

After you file

No.  You just pick 1 separate return (probably his) and only amend it to change it to Joint by adding all the other spouse's info to it.  Just forget about the other person's separate return.

How to Amend MFS to Joint  -OR - Joint to Separate (before April 15)
https://ttlc.intuit.com/replies/3300283