How many stamps to send a package from TX to AZ?

Answer 1

The cost depends on the weight of the package. There are also some special low rates for books and other media. There are also flat-rate boxes supplied for free by the PO- if you can fit what you want to mail into such a box it ships for the specified rate which is often less than otherwise. You have to hand your package directly to a post office employee if it weighs more than a pound.