1.1ÌýÌýÌýÌý Introduction: overview of the domestic payroll system
The United States tax system for individuals is based on a calendar year. Income and tax withholdings are reportable on a calendar year basis, regardless of whether the employer uses a different fiscal year for its own tax reporting.
The US federal tax law begins with the Internal Revenue Code (IRC), enacted by the United States Congress in Title 26 of the United States Code (26 USC).
Additional information can be found in Treasury regulations associated with many of the Code Sections. These Regulations provide the official interpretation of the tax law from the
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Web page updated on 17 Mar 2025 15:21