You file Form 1040 or 1040-SR and itemize deductions on Schedule A (Form 1040). Find tax withholding information for employees, employers and foreign persons.If Withholding Tax Allowance was elected, you must file a RITA claim within 120 days of the following calendar year. You must give Form NJ-W4 to your employees to fill out and return to you. This form tells you how to withhold tax from your employee's pay. The law says that Treasury may withhold money to satisfy an overdue (delinquent) debt. Any unused portion of the qualified expenses may not be carried over to another taxable year. Sponsors: Representatives Collins, Bradford, Rogers, and Millis (Primary Sponsors). Here are some of the more common taxes retirees face and how they work. Social Security Taxes.