Tax Year Prior to 2020: What if I don't know my spouses income?

[puakenikeni70]

What if I don't know my spouses income? I am filing married but separate.

[KarenL2]

If you can't find out what it is, then enter zero. It won't matter unless you live in a community property state. Income allocation is only really required in community states.  Community property states are: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin.

If you do live in a community property state, and there is an issue with your filing, the IRS (and/or state) will notify you of any adjustments (if needed) once your spouse has filed.

Married Filing Separately in a Community Property State

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