Does amazon charge sales tax on sales that I make in the state that I'm in? I can't see a breakdown of this. I'm in Texas
If you turned it on they do. You need to put your ID in the appropriate state to collect and then set your product tax codes.
Ah, I see. Where do I do this in Seller Central?
The tax setup is in Settings, Tax Settings. You can also set a default product tax code there to get started, but you should code each item.