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. All of the involved US shareholders need to fill out Form 8594, Asset Acquisition Statement Under Section 1060, and attach them to their Form 5471. 1. Gather necessary documentation for the asset sale. Learn how to file form 8594 and when to file. The allocation of the Purchase Price is intended to comply with the requirements of Section 1060 of the Code. Buyer and Sellers agree to act in accordance with such allocations in all Tax Returns, reports or filings, including IRS Form 8594.