Don't wince. This required tax form controls how much tax will be withheld from your paychecks and affects your take-home pay. Form W-4 is your friend and it's not difficult to fill out.

Quick tip: Fill out Form W-4 for the job with the higher income for the most accurate withholding. Claim dependents Source: IRS Add the number of dependents you can claim on your tax return.

Experiencing a major life change or receiving a big refund or a high tax bill are all reasons to consider filling out a new W-4 form and adjusting your withholding amount.