I don't provide my dependent's insurance - shared custody & made mistake on marketplace application - put household 1 instead of 2 what do I do?

Shared custody - I claim my child on taxes as their guardian does not work. Child receive's state insurance through guardian.

I accidentally put household 1 instead of 2 on Marketplace Insurance application thinking I only included who I needed coverage for. I receive assistance from marketplace. 

Next year, I will need to file my 1095-A, do I need to add my dependent to my household count even if I don't provide their insurance?

Do I need to purchase insurance for my dependent even if they already have it?

Do I withdraw from my insurance? Or do I just not claim my dependent on taxes?

Just don't want to have legal issues, have phobia of legal issues.