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. A taxable asset purchase allows the buyer to "step up," or increase, the tax basis of the acquired assets to reflect the purchase price. Go to Screen 65, Asset Acquisition Statement (8594) (Screen 58 for S-Corp). Every other corporation that is subject to Maryland income tax law and has income or losses attributable to sources within Maryland must also file Form 500. Today's goal is to help you understand the importance of IRS Tax Form 8594 in preparing for sale of your business to a third party… Agreements Between the Parties.