After you file

Sorry for jumping in. My son and I are in the same boat.  My son was covered only for Jan.  Starting Feb I got him out of the insurance since he started working and got his own insurance from work outside of marketplace.  Now I have got a 1095-A which lists my wife and all my kids including him. The numbers for Jan are obviously higher than the rest of the months.  I didn't have to pay any premium out of pocket.  We plan on allocating 100% to me and 0% to him.  How would his 8962 look like?  Does he have to enter amounts for all the month rows or only for Jan when he enters 1095-A on his side? Last thing we want is either one of us to pay for the premiums.