File this form to apply for a one-time extension of time to file: Form 5500, Annual Return/Report of Employee Benefit Plan; Form 5500-SF, Short Form Annual Return/Report of Small Employee Benefit Plan; Form 5500-EZ, Annual Return of One-Participant (Owners and Their Spouses) Retirement Plan; or Form 8955-SSA, Annual Registration Statement Identifying Separated Participants With Deferred Vested Benefits. Current revision Form 5558 PDF Recent developments Form 5558 is no longer used to apply for an extension of time to file Form 5330 -- 09-JAN-2024 Other items you may find useful All Form 5558 revisions Form 5500 Corner Other current products Related items About Form 5500-EZ, Annual Return of A One-Participant (Owners/Partners and Their Spouses) Retirement Plan or A Foreign Plan About Form 8822, Change of Address About Form 8822-B, Change of Address or Responsible Party - Business About Form 8955-SSA, Annual Registration Statement Identifying Separated Participants With Deferred Vested Benefits About Form SS-4, Application for Employer Identification Number (EIN)