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. Coordinate on Allocation Values. Form 8594 is the Asset Acquisition Statement, which the buyer and seller must complete and submit to the IRS. – Both the purchaser and seller are required to file Form 8594. Who Must File Form 8594? Both the seller and purchaser of a group of assets that make up a trade or business need to file Form 8594. If you are calling from outside of the 48 contiguous states, please call 1-916-445-6362 or complete our online form to reach our Customer Service Center.