General Government covers the executive, legislative, and judicial branch overhead plus tax administration — about $36 billion in FY2024, one of the smallest functions despite running the entire federal government. The biggest single line is the IRS (~$13B), which collects $4.9 trillion in annual revenue and processes hundreds of millions of returns.
Other significant pieces: the rest of the Treasury Department (~$7B for Office of Foreign Assets Control sanctions enforcement, Bureau of Fiscal Service, US Mint); the entire legislative branch (~$7B for House and Senate operations, Capitol Police, Library of Congress, CBO, GAO); GSA federal buildings and procurement; the Office of Personnel Management; and the Executive Office of the President (White House Office, OMB, OSTP, NSC).