Form W-9, Request for Taxpayer Identification Number (TIN) and Certification, is an Internal Revenue Service (IRS) ... How to Fill Out Form W-9. Form W-9 is available on the IRS website.

Form W-9 is an IRS document that businesses use to collect a person's tax identification number (TIN). Independent contractors who were paid at least $600 during the year need to fill out a W-9.

Keep a copy of all of your W-9 forms. You will fill out one for each client, so you could have several for the year depending on the number of clients you have.

The main difference between a W-9 and a 1099 is that you fill out a W-9, while the business or entity that is paying you fills out the 1099. In most cases, you should receive any 1099 form by the ...