Certified Professional Employer Organizations (CPEOs) use this form to notify the IRS that a service contract between a CPEO and a customer has started or ended. Current revision Form 8973 PDF Instructions for Form 8973 (Print version PDF) Recent developments None at this time. Other items you may find useful All Form 8973 revisions About Publication 1167, General Rules and Specifications for Substitute Tax Forms and Schedules About Publication 15-A, Employer's Supplemental Tax Guide (Supplement to Circular E, Employer's Tax Guide, Publication 15) Other current products Related About Form 943, Employer's Annual Federal Tax Return for Agricultural Employees About Form CT-1, Employer's Annual Railroad Retirement Tax Return About Form SS-4, Application for Employer Identification Number (EIN) About Form W-2, Wage and Tax Statement
