I am trying to amen in order to change the MFS filing status to MFJ status. However, I am perplexed, and I need guidance. Here's my question - Which Form1040 should we use to amend the filing status (from MFS to MFJ)? Do we use the Taxpayer's Form 1040 or the Spouse's Form 1040, or do we file 2 Forms 1040-X to amend each of the previously filed Forms 1040? Any thoughts? Thank you.