This form allows the employee to verify that the employer is withholding the correct tax rates for the correct municipalities. Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay.Give Form W-4 to your employer. Pennsylvania employees generally do not have to fill out a state tax withholding form (the equivalent of a state W4). Purpose. Complete Form REV-419 so that your employer can withhold the correct Pennsylvania personal income tax from your pay. Employee name: first, middle initial, last. Completion of this form will provide the employer with the correct local earned income tax rate to withhold from each employee. 9 Form (Federal) The 9 form verifies an employee's identity and certifies that the employee is legally allowed to work in the United States. What are the relevant contractor tax forms in Pennsylvania? Do I need to set up separate withholding accounts?