Download your tax return with form W-9 at. Pdf. Request for Taxpayer. Identification Number and Certification. ▷ Go to the NC DOT tax form download site below. The site is not up-to-date. A copy of a tax form. Download a form and the instructions at. If you want to upload your tax return to file in person, request a tax prepayment form. You can do this from a paper form. Find a vendor, prepare your tax return, get a vendor prepayment in the mail, get a vendor rebate (which can be redeemed at the vendor for the vendor tax return) and more. Request for Taxpayer. Identification Number and Certification. ▷ Go to. If you have an old phone bill, or a paper invoice, you can use these for a request for taxpayer and vendor identification numbers. Get vendor prepayment. ▷ Go to the NC DOT vendor prepayment form Download NC DOT vendor prepayment form, complete and attach along with your completed W-9 form to. Get a vendor rebate. ▷ Go to. If you are a vendor, you can get a vendor pre-payment rebate when you complete your tax return. Request for Taxpayer. Identification Number and Certification. ▷ Go to. If you want to upload your tax return to an file site, you can do this from a paper form. Download your tax return with a request for taxpayer and vendor identification number and complete a separate file. Download an file at for your tax liability. Vendor Prepayment Rebate. ▷ Go to.