Question: do you have to fill out a w4 for every job?
Answer: You typically have to have a W-4 on file for each job. For the highest paying job's W-4, fill out steps 2 to 4(b) of the W-4. Leave those steps blank on the W-4s for the other jobs. If you're married and filing jointly, and you both earn about the same amount, you can check a checkbox indicating as much.