To claim exempt, write EXEMPT under line 4c. Step 3: Claim dependents, including children.A Form W4 claiming exemption from withholding is valid for only the calendar year in which it's furnished to the employer. Please contact a tax advisor for more information. If you choose exemption you will be asked to complete another W-4 at the end of the year because it expires. The redesigned W4 form no longer has allowances. We explain the five steps to filling it out and answer other FAQ about the form. Knowing how to fill out your W4 depends largely on knowing how many allowances you should claim. The redesigned W4 form no longer has allowances. We explain the five steps to filling it out and answer other FAQ about the form.