How to Adjust the W-4 Tax Withholding When Married

1). Complete the personal information on lines 1 and 2 of your new Form W-4. This includes your name, address and social security number.
2). Check the box for "Married" in item 3 to inform your employer to use the married tax tables when figuring withholding, which results in less money being deducted. If you prefer to have more withheld so that you get a larger refund when you file your taxes, check the "Married, but withhold at the higher Single rate" box.
3). Complete the Personal Allowances Worksheet if you only have one job and your spouse does not work. If your spouse works or you work multiple jobs, complete the Two-Earners/Multiple Jobs Worksheet. Whichever of these worksheets you complete tells you how many allowances you are entitled to claim.
4). Claim all of the allowances you are entitled to by writing the amount on line 5 of Form W-4. If you prefer to have more money withheld, take an allowance or two fewer than you are entitled to.
5). Submit your new Form W-4 to your employer. Your employer must start basing your withholding from the new form within 30 days of receiving your revisions.