Use this tool to estimate the federal income tax you want your employer to withhold from your paycheck. This is tax withholding.As employers, state agencies and institutions of higher education must deduct federal income tax (FIT) from the wages of a state officer or employee. The Pay application helps you to accomplish all payroll related tasks and view pay information. You can view or edit your withholding elections. Request to withhold taxes. Submit a request to pay taxes on your Social Security benefit throughout the year instead of paying a large bill at tax time. You will need to apply using form AP-201, Texas Application (PDF). Learn about income tax withholding and estimated tax payments. The new form has five steps.