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.In Part IGeneral Information, enter the name, address, and TIN of the other party to the transaction (purchaser or seller). Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Line 1: Enter the name, address, and Tax Identification Number (TIN) of the other party (either the purchaser or seller). Learn how to file form 8594 and when to file. The buyer must also file Form 8594 for the transaction. 1. Gather necessary documentation for the asset sale. The purpose of Form 8594 is to determine the treatment of the assets for tax purposes, establish the basis of the acquired assets for the purchaser. Go to Screen 65, Asset Acquisition Statement (8594) (Screen 58 for S-Corp).