Employers in Puerto Rico use Form 941-X (PR) to provide information and certifications to support prior period adjustments to social security and Medicare taxes reported on Form 941 (PR). Product is in Spanish and for use only in Puerto Rico. Current revision Form 941-X (PR) (in Spanish) PDF Instructions for Form 941-X (PR) (in Spanish) PDF (HTML (in Spanish)) Recent developments Certain forms, instructions, and publications used by taxpayers in Puerto Rico have been replaced -- 14-MARCH-2024 Other items you may find useful All Form 941-X (PR) revisions EFTPS: The Electronic Federal Tax Payment System Notice 2015-2, Application of Retroactive Increase in Excludable Transit Benefits PDF Notice 2016-06, Application of Retroactive Increase in Excludable Transit Benefits PDF Other current products Related items About Publication 179 (Circular PR), Federal Tax Guide for Employers in Puerto Rico About Publication 556, Examination of Returns, Appeal Rights, and Claims for Refund