Use Form 8813 to pay the withholding tax under section 1446 to the United States Treasury. Form 8813 must accompany each payment of Section 1446 tax made during the partnership's tax year. Current Revision Form 8813PDF Instructions for Forms 8804, 8805 and 8813 (Print VersionPDF) Recent Developments Taxpayer Relief for Certain Tax-Related Deadlines Due To Coronavirus Pandemic -- 14-APR-2020 Other Items You May Find Useful All Form 8813 Revisions About Form 8804, Annual Return for Partnership Withholding Tax (Section 1446) About Form 8805, Foreign Partner's Information Statement of Section 1446 Withholding Tax About Publication 519, U.S. Tax Guide for Aliens Other Current Products Related Items About Form W-7, Application for IRS Individual Taxpayer Identification Number About Form W-9, Request for Taxpayer Identification Number and Certification About Form 8804-C, Certificate of Partner-Level Items to Reduce Section 1446 Withholding