What Is A W9 Used For 2024 Tax Year. Form w9 is an irs form a vendor submits with a taxpayer identification number (tin) and contact information to businesses that pay them. What is a w9 form?

Form w9 is an irs form a vendor submits with a taxpayer identification number (tin) and contact information to businesses that pay them. For the tax year 2024, the top tax rate is 37% for individual single taxpayers with incomes greater than $609,350 ($731,200 for married couples filing jointly).