It does not matter if the parents already filed. Enter the parent's 1095 A in the dependent return. Choose either spouse or taxpayer, that really does not matter because that information does not get sent to the IRS. Scroll down and in the Allocation worksheet, enter the father social security and 1.0 that means he is responsible 100 % for the policy. It should not change the results in the dependent's tax return. Hope it helps.