Trustees use this form to figure and report the tax due from certain trust terminations that are subject to the generation-skipping transfer (GST) tax. Current revision Form 706-GS (T) PDF Instructions for Form 706-GS (T) (Print version PDF) Recent developments None at this time. Other items you may find useful All Form 706-GS (T) revisions About Form 706, United States Estate (and Generation-Skipping Transfer) Tax Return Other current products Related About Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns About Form SS-4, Application for Employer Identification Number (EIN)