My ex-wife has our kids on her Marketplace insurance and receives a 1095-A for them. I, however, have a 1095-C and do not have an policy shared with her. I am claiming two of our kids this year and my return got rejected because I failed to include a 1095-A form, which I do not have. What do I do going forward? Do I need to input ex-wife's info even though my name isn't on it and only my kids are?
Yes. You will need a copy of the 1095A to enter on your tax return and indicate a shared policy with zero percent allocated to you.
Your ex-spouse will do the same on her tax return but allocate 100% to herself.