Complete el Formulario W-4 para que su empleador pueda retener la cantidad correcta del impuesto federal sobre los ingresos de su paga. Purpose: Complete form L-4 so that your employer can withhold the correct amount of state income tax from your salary.The following forms can be downloaded to your computer or printed as needed . The new form has five steps. Employees must fill out step 1 and step 5. 4(SP) Employee's ithholding Allowance Certificate in Spanish. Alabama. Use Form I9 to verify the identity and employment authorization of individuals hired for employment in the United States. Employee Withholding Form (G4) is to be completed and submitted to your employer in order to have tax withheld from your wages. A W4 form, or "Employee's Withholding Certificate," is an IRS tax document that employees fill out and submit to their employers. Please read all instructions first and type or print in black ink to complete this form.