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. In an asset sale, Seller and Acquiror each must complete Form 8594, Asset Acquisition Statement. Under Section 1060 (Rev. Feb. Gains from the sale, exchange or other disposition of any kind of property are taxable under the Pennsylvania personal income tax (PA PIT) law.