Regulated investment companies use this form to: figure and pay the excise tax on undistributed income under section 4982, and make the section 4982(e)(4) election. Current revision Form 8613 PDF Recent developments None at this time. Other items you may find useful All revisions for Form 8613 Other current products Related items About Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns