The Board of Governors of the Federal Reserve System issued Consumer Affairs Letter CA 18-2 to distribute a revised guide for Home Mortgage Disclosure Act (HMDA) reporting. This guidance supports financial institutions in complying with Regulation C amendments effective for data collected starting January 1, 2018, by clarifying changes to institutional coverage, transaction types, and data collection requirements. The letter applies to all Federal Reserve-supervised institutions and provides an easy-to-use summary of key provisions to assist with accurate reporting and disclosure.