got a tax letter and now i feel like i’m spiraling

I live in Fort Lauderdale and just got a letter in the mail that says I owe taxes from a couple years ago. It’s written in this scary, official language and now I’m totally freaking out. I always thought I was on top of things, but maybe I messed something up. I started looking online for help and it’s honestly overwhelming. I keep seeing tax relief and tax resolution options but I don’t even know what the difference is. Everything feels like a sales pitch. I’m scared to trust the wrong company and make things worse. Has anyone here in Fort Lauderdale actually used one of these services and had it go okay? I feel really stuck.