<prompt> Human: Any advice would be greatly appreciated. Im a 29 yo, single no kids, and made 81K last year. I owe over 3k for income taxes, I wasnt expecting it, this is the first time I have to pay. I busted my behind last year working two jobs with practically no days off. I spent most of my money towards saving and paying back student loans this year, i paid triple the amount each time. I wasnt able to use that as an deduction because I made too much. Is there any steps I can take to decrease the amount next year? Somebody told me I should invest but Im not quite sure how that works. I also use my personal car for work and I travel quite a bit, not sure if I can use that as a deduction also. Any advice???  <response>: Fill out your W-4 correctly. 