George4Tacks
Level 15

https://proconnect.intuit.com/community/tax-filing-status/help/individual-mfj-vs-mfs-comparison/00/5...

and

https://proconnect.intuit.com/community/state-taxes/help/community-property-states-and-the-mfj-mfs-w...

This should get you started on the HOW, but not the whether there really is an advantage. IRS should make their position clear before the statute of limitations expires. 


Here's wishing you many Happy Returns