Puerto Rico I.R.S. Form SS-4 is a crucial document required for obtaining a federal identification number (EIN) in Puerto Rico. This form plays a significant role in establishing the tax identity and business entity of individuals or corporations operating in Puerto Rico. By utilizing relevant keywords, the information below provides a detailed description of Puerto Rico I.R.S. Form SS-4 and its various types: 1. Puerto Rico I.R.S. Form SS-4 — This is the standard application form used to request an Employer Identification Number (EIN) or federal identification number for businesses based in Puerto Rico. It is essential for both domestic and foreign entities operating within Puerto Rico to obtain this unique identification number for tax purposes. 2. Puerto Rico I.R.S. Form SS-4 (Individual) — This specific variant of Form SS-4 is designed for individuals operating their business as a sole proprietorship in Puerto Rico. It allows sole proprietors to apply for an EIN associated with their business, separating their personal identification number from their business identity for tax-related matters. 3. Puerto Rico I.R.S. Form SS-4 (Corporation) — This variation of Form SS-4 is dedicated to corporations, including C Corporations, S Corporations, and limited liability companies (LCS) operating in Puerto Rico. These entities need to complete this form to establish their federal identification number, which is vital for filing taxes, obtaining banking services, and managing other legal obligations. Puerto Rico I.R.S. Form SS-4 requires comprehensive information, including the legal name, trade name (if applicable), address, contact details, entity type, responsible party information, and a few other details. The completed form should be submitted to the Internal Revenue Service (I.R.S.) to initiate the process of obtaining a federal identification number (EIN) in Puerto Rico. In conclusion, Puerto Rico I.R.S. Form SS-4 is an essential document required for businesses and individuals operating in Puerto Rico to obtain a federal identification number. By differentiating forms specific to individuals and corporations, the I.R.S. ensures accuracy and compliance while facilitating tax-related procedures in Puerto Rico.