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). Allegheny County Central TCD Version If you lived in any of these PSD Codes at any point in the year, you must file this form (Replaces PGH-40). Learn how to file form 8594 and when to file. The target company's allocation must match buyer's allocation.