Tax Year Prior to 2020: I am married. How can I file separately with the mortgage?

[KarenL2]

It can get a little tricky.  Whoever paid for it can deduct it on their Schedule A Itemized Deductions.  Unless, you live in a Community Property state, then it is reported on each tax return 50/50.  Also, when you file as Married Filing Separately, if one spouse itemizes on Schedule A, the other must also itemize on Schedule A.

Is it better for a married couple to file jointly or separately?

https://ttlc.intuit.com/replies/3288477

Married Filing Separately in a Community Property State

https://ttlc.intuit.com/replies/3301943