Which form is used to apply for an original Social Security card?

The application for an original Social Security card is correctly identified with Form SS-5. This form is specifically designated for individuals to apply for a new Social Security card, whether for the first time or to replace a lost or stolen card. It includes essential information such as the applicant's name, date of birth, and place of birth, which helps the Social Security Administration to accurately issue the card and maintain correct records.

The other forms mentioned serve different purposes: Form W-9 is used to request the Taxpayer Identification Number and Certification, typically for U.S. persons who are going to receive certain types of income. Form SS-4 is the application for an Employer Identification Number (EIN), which is necessary for businesses to report taxes and other financial documents. Form SS-8 is used to request a determination of worker status for purposes of federal employment taxes and income tax withholding. Each of these forms addresses different needs related to tax and identification processes, reinforcing that Form SS-5 is exclusively for Social Security card applications.