From the Document: "By law ('31 U.S.C. [United States Code] §1105(a)'), the President is to send the federal budget request to Congress by the first Monday in February. In practice, Presidents sometimes send it later. On March 28, 2022, President Joseph R. Biden submitted the 'FY2023 budget request,' including proposed funding for the Department of Defense (DOD), nuclear weapons programs of the Department of Energy, and other national defense-related activities. The National Defense Authorization Act (NDAA) typically sets policy and authorizes appropriations for the vast majority of these activities. This product provides the status of congressional activity on the National Defense Authorization Act for Fiscal Year 2023 (FY2023 NDAA; H.R. 7900; S. 4543)."
CRS Insight, IN11985
Congressional Research Service: https://crsreports.congress.gov/