Real estate investment trusts (REITs) use this form to figure and pay the excise tax on undistributed income under section 4981. Current revision Form 8612 PDF Recent developments Correction to EFTPS contact information -- 15-NOV-2022 Other items you may find useful All revisions for Form 8612 About Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns Other current products