I obtained marketplace insurance for 2018 and indicated a family size of 4. The advanced premium tax credits that I received were based on a family of 4. Now I have 2 sons and it turns out that they must each file their own return. I understand that I can allocate their premium credits onto my return when we all file 8962, but I have been told that I can only write 2 for my tax family size on line 1, because they are not included on my return. This will greatly change the premium credit calculations on lines 2-8, because they are based on the family size entered on line 1. How do I fill out the forms so that I can claim all the premium credit on my return, and use a family size of 4, which is the true size of my insurance family?