If you are single with no dependents and only one job, you don't have a lot of flexibility. On the W-4, just fill out Step 1 and check the box for Single. Leave Steps 2, 3, and 4 blank. Sign and date the form in Step 5 and give it to your employer. After you get your first paycheck, go back to the Tax Withholding Estimator and see where you stand. If you want to make an adjustment, fill out a new W-4 and give it to your employer.