After you file

So I just received Notice 1445. But it came with another letter stating I'm owed a refund from 2020. It states: "We changed your 2020 Form 1040because of recent tax laws, rulings, or regulations required us to correct your unemployment compensation". Refund due: $733.00.  It's basically a decrease in tax owed in 2020. I don't know why I got the 1445 form because it's for tax help in other languages.