Which of the following is a use for Form W-9?

Form W-9 is utilized primarily to collect identifying information from individuals and entities that are required to report certain types of income to the IRS. This includes information such as the individual's name, business name (if applicable), address, and Taxpayer Identification Number (TIN). Businesses use this information to ensure they correctly report payments made to independent contractors and other non-employees on forms such as 1099.

In contrast, applying for a Social Security card, an Employer Identification Number (EIN), or determining employee withholding allowances pertains to different forms and processes. For example, a Social Security card is obtained through a specific application process with the Social Security Administration, and Form SS-4 is used to apply for an EIN. Employee withholding allowances, on the other hand, are determined with Form W-4. Therefore, the correct usage of Form W-9 centers around the collection of identifying information for IRS filings.