August 2013) or use the online Form W-9 program. Do not use it to request Form W-4, Request for Taxpayer Identification Card. W-9. Form. (Rev. August 2013). Department of the Treasury. Internal Revenue Service. Request for Taxpayer. Identification Number. ▷ Go to Maryland Community Connection to obtain an W-9 (Rev. August 2013) or use the online form W-9, Request for Taxpayer Identification Number and Certification. Do not use it to request Form W-4, Request for Taxpayer Identification Card. How to Obtain W-9.