Tax credits

Are the tax credits for premiums only a one time thing? I don’t understand how any of this works and I just make $200 too much to qualify for Apple health that I have been on. I’m going to have to drastically reduce my hours at work now to cover it and it’s going to really put me in a tight spot.

I’m 26 and have an ongoing knee injury for 3 years now (can’t bend it at all) and I’ve been trying to find a doctor that can finally help me.

However on the ambetter cascade plan it says it’s $44 after savings for premium yet when I click into it it says $450 premium. It says I qualify for the savings but is that a one time thing?