<prompt> Human: My sister is trying to do her taxes herself. She had two jobs last year, in one she made 25k, and the other 5k. Is there a income class that dictates what percentage of your total income you get back? She is only getting a little over 300 back where as last year she got 1k. Should I recommend her to take her information to an HR block or a Jackson Hewitt? Thank you for any help given.  <response>: You have a fundamental misunderstanding of how taxes work. A great place to start is in the sidebar under the 2015 help series. Particularly, check out For a much more in-depth explanation, check out Having two jobs can make the withholdings more complicated, as neither job will know about the other, and both will withhold based on the W4 assuming theirs is the only job. 