System Support for the online Foreign Account Tax Compliance ACT (FATCA) Registration, including help with login problems, error messages, and other technical issues. When contacting the IRS for assistance with a forgotten FATCA ID the following information is needed: Financial institution legal name. Your name and role with the financial institution. The business email address associated with your role. Note: Access Code reset is unavailable for email delivery. Please use the telephone numbers below for assistance during the support hours. Caution: If you have tax law related questions regarding the FATCA Registration Process, please refer to Information about the Foreign Account Tax Compliance Act (FATCA). The system support page cannot respond to tax law questions regarding the FATCA regulations. Telephone support is available 6:30 a.m. to 6:30 p.m. (US Central Time), Monday through Friday. From the United States of America, call toll-free at 866-255-0654 from outside the United States of America, you may call us at 512-416-7750 (not toll-free). Please note: When completing this form, do not provide any personal identification information such as your name, taxpayer identification number, social security number, address, or telephone number. Your email address Message Send message PreviewCancel