Re: I'm assuming that the USA
I seem to remember that there are a lot of things you can get deductions from over there.
There's a guide here.
"There are hundreds of deductions and credits out there. Here’s a drop-down list of some common ones, as well as links to our other content that will help you learn more."
But it seems they can go the route we do and just accept a single deduction (what we call a personal tax allowance).