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.Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Go to Screen 65, Asset Acquisition Statement (8594) (Screen 58 for S-Corp). Enter a 1 or 2 in the field 1=buyer, 2=seller (MANDATORY). Probate Court Forms. Learn how to file form 8594 and when to file. Each of Seller and Buyer agrees to provide the other promptly with any other information required to complete IRS Form 8594.