How to allocate income - MFJ in Idaho as Part-Time Resident with Spouse Nonresident (lives in Missouri)

[awslroberts]

My mom moved to Idaho mid-year, dad lives in Missouri. ID and MO both require filing MFJ for state if you file MFJ federal. Also ID is community property, MO is not. Approximately 80% of the income is from dad's pensions and interest income, 20% from mom's interest income. What do I enter for income earned in Idaho? A quarter of the total, which would be mom's half of the total for half the year? Or only what mom earns from her investments/SSA for half the year, since MO isn't community property so she's not entitled to half of dad's income? Or the whole income they both earn for the year, and what belongs to dad will get taxed in MO and then ID deducts that? Or something else entirely?

[MaryK4]

For the Idaho part-year return, your mother would report 1/2 of her interest/SSA income , your father would report 1/2 of her interest/SSA income (as nonresident/Idaho source income).  The Idaho entry in TurboTax is easy because you do not have to distinguish whose income it is- you will enter the amount of her interest/social security for the time she lived in Idaho.  

For the Missouri return, a part-year resident can take either the Missouri resident credit or the Missouri income percentage, whichever provides the greater benefit. Because Idaho is a community property state, you can try both ways to see which is better.  

[awslroberts]

I've got a follow-up question for the MO return. I filled out the MO-NRI for my mom and entered the amount of my mom's income that was earned while she lived in MO, figuring there was no double-payment, since ID wouldn't be taxing that, so the MO-CR wasn't appropriate. But Turbotax then created an MO-CR, listing the ID total income and total tax amounts under my dad's column. I'm confused as to whether that's legitimate. Should I leave it as-is and submit both the NRI and the CR? Or do I maybe need to adjust the CR to only reflect half of the ID income and taxes that belongs to Dad because of ID community property laws, even though MO isn't community property?

Thanks for your help!