Instructions for the Requester of Form W-9 (8/2018) — IRS Oct 2024 — IRS has now released its tax forms and guidance. Instructions are included with Form W-9, Request for Taxpayer Identification Number and Certification (TIN). It is available via Tax Forms. ▷ Go to for instructions and the latest information. Additional Information ▷ Go to for instructions and the latest information to find out more about Form W-9. This information is also available on Form W-8. The IRS also provides a free publication called IRS: Tax Tips that can be downloaded and printed. The tax tips provide information on how to properly file any tax return. If you have questions, feel free to contact the CRA Customer Service Center and provide them with your name, address, and phone number. To provide the information to the CRA you must: Ensure that the information is accurate When providing information that is not in your own possession, provide copies or another credible means of confirming that the information is correct Ensure that the information is submitted in the right format If you would like to file a complaint, follow the steps below.