Contact HR at your job to update your W-4 (many jobs nowadays allow you to do it yourself at their website).
UPDATE your STEP 1 information.
For STEP 2 fill out the form according to your filling status.
You may need to make adjustments on STEP 4 part (c) since you are making adjustments to your W-4 in the middle of the Tax Year. To this end, the following post may prove very helpful: Underpayment of Tax Penalty ** Say "Thanks" by clicking the thumb icon in a post ** Mark the post that answers your question by clicking on "Mark as Best Answer"
