Do I need to fill out both boxes on the community property income adjustments screen when filling as a RDP when doing my return first?

[irs21g]

We both became Registered Domestic Partners (RDP) on Sept. 19, 2017. She is fully retired, so her retirement income is not subject to community property income. I was working full-time, so my income for, basically, the last quarter of the year is subject to community property income. We also live in Calif. I know that my portion that is subject to community is split 50/50, and my half would go into the "Community Property Addition Adjustment" box, BUT does her half go into the "Community Property Subtraction Adjustment" box? Or, I leave it blank and enter it in the "Community Property Addition Adjustment" box when I do her return?

Thank you!

[MaryK1 · Accepted solution]

Actually, you want to enter your half as the Subtraction, and on her return the half is an addition.  This is to "adjust" the amount reported on the W2 to the amount that gets taxed (so the community income on your return is subtracted from the total on the W2 (in your name) then added on her return).

[irs21g]

Thank you for your help! This is my first time I'm doing our taxes under this scenario, so your response helped to turn on the "bulb" of understanding! I also take it (to verify) where I put in an amount to subtract (for my return) I leave the addition box empty, and for her return, where I enter the amount in the addition box, I leave her subtraction box empty.