Form 8594 must also be filed if the purchaser or seller is amending an original or a previously filed supplemental Form. 8594 because of an increase or decrease.Enter your name and taxpayer identification number (TIN) at the top of the form. Then check the box for Purchaser or Seller. Enter the following information: (1 (At top left) Print the name and other information requested for the person submitting this form. Frequently Requested Forms, Civil Court Forms, Criminal Court Forms, Family Court Forms, Financial Forms, Probate Court Forms, Specialty Court Forms. 1. Gather necessary documentation for the asset sale.