Please see mailing link below. In general, if a withholding agent cannot reliably associate a payment with valid documentation (e.g. Form.This article discusses a U.S. businesses potential obligation to withhold U.S. taxes to a foreign contractor. Call SF Tax Counsel today. The Alabama Department of Revenue offers a FREE electronic service, My Alabama Taxes (MAT), for filing and remitting withholding tax. Nonwage withholding pursuant to Internal Revenue Code (IRC) 3406 (Backup Withholding) and 3402. If you have earned income or scholarships while living in the United States, you must file a Federal income tax return.