Be sure to check the 'multiple jobs' box on the w form. And read the instructions on filling it out.This video goes over how to complete Form W-4 if you have 2 jobs or if you are married and your spouse works as well. Use this step if you (1) have more than one job at the same time, or (2) are married filing jointly and you and your spouse both work. There are a few things to keep in mind when filing your personal taxes with multiple W2 tax forms. Watch this video to learn what you need to do. The IRS instructions for the W4 includes the line: Multiple jobs. Complete Steps 3 through 4(b) on only one Form W-4. Give your completed Form IL-W-4 to your employer. Keep the worksheet for your records.