<prompt> Human: I know my taxs at the end of the year are going to be about 4k. I need any general advice for any helpful deductions and exemptions that i can apply as a single 21 yr old.Edit: i was hired as a 1099 at first sorry for any confusion.  <response>: The W-4 form is what tells them how much to withhold for you. They give you a W-2 at the end of the year telling you how much you made and they withheld.Just follow the worksheet - since youer single with no kids and not making a shitload of money or using a ton of writeoffs, youll be fine just doing that. 