Letter 6470

Hello!

I got Letter 6470 stating that IRS changes the RRC on my 2020 taxes due to adjusting my income which exceeds a certain amount. I’ve never changed my income nor do I make the minimum amount to exceed it. It states that my one of my qualifying dependent exceeds the age limit but I don’t have kids and I filers this when I was single. What should I do? Who can I contact because I am confused and wouldn’t know how to address this issue.