Complete el Formulario W-4 para que su empleador pueda retener la cantidad correcta del impuesto federal sobre los ingresos de su paga. 4(SP) Employee's ithholding Allowance Certificate in Spanish. Alabama.A W4 form, or "Employee's Withholding Certificate," is an IRS tax document that employees fill out and submit to their employers. Information about Form W4, Employee's Withholding Certificate, including recent updates, related forms and instructions on how to file. This form and the information provided are not substitutes for the advice and services of an attorney and tax specialist. Commentary. In our commitment to open government, we invite open records requests in writing. Click here to access an Open Records Request form. Purpose: Complete form L-4 so that your employer can withhold the correct amount of state income tax from your salary. . Each applicant, or their representative, must complete and sign a visa application form, filling in each of its sections. 2. Resources include information on different parts of the form and what to do before and after completing the FAFSA form.