Generally, both the purchaser and seller must file Form 8594 and attach it to their income tax returns (Forms 1040, 1041, 1065, 1120, 1120-S, etc.) Both the buyer and seller must file Form 8594 with their respective tax returns for the year of the transaction.Learn how to file form 8594 and when to file. Both the purchaser and the seller must attach Form 8594 to their respective tax returns in the first year of the sale. To prepare IRS Form 8594, Asset Acquisition Statement, the consideration must be allocated between the assets based on their class, in order:.