Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. A guide to Texas payroll policies and procedures.Download and complete Texas property tax forms. Use the mortgage tax savings calculator to determine how much your mortgage payments could reduce your income taxes. A W4 tells your employer how much tax to withhold from your paycheck when you start a new job, but you can adjust it any time. The redesigned W4 form no longer has allowances. We explain the five steps to filling it out and answer other FAQ about the form. The term "withholding tax" refers to the money that an employer deducts from an employee's gross wages and pays directly to the government. You may need to fill out a W-4 state form on top of a W-4 federal form. The form tells your employer how much federal income tax to withhold from your paycheck.