I did side jobs all year. Do I need to claim that? If yes, what should I do?

Answer 1

Uh, yes you do - that's income. You need to show the total - if you haven't kept records through the year, you could have a problem here, but if you don't have records but can estimate fairly closely, you'd probably be OK.

You'd report them on a schedule C or C-EZ, along with any expenses you had for the side jobs. Then you'd fill out a schedule SE to calculate self-employment tax (social security and medicare) on the net. The numbers from there would transfer to a form 1040 to calculate your income tax. If you also have W-2 income, it would go right onto the 1040.

Answer 2

you are allowed to make so much money per year tax free.

so if you want to report it

go ahead and file to see what that amount is.