reports to Congress and the President on the financial state of the government and the economy, regulates the interstate and foreign sale of alcohol and firearms; supervises the printing of stamps for the U.S. Postal Service; operates the Secret Service, which protects the president, the vice president, their families, and other officials; curbs counterfeiting; and operates the Customs Service, which regulates and taxes imports. The Internal Revenue Service, a branch of the Treasury, regulates tax laws and collects Federal taxes