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. Further, the parties should agree to file a supplemental Form 8594 to reflect any such increase or decrease. Both entities must submit IRS Form 8594 with matching allocations. Such alignment reduces audit risk. The Tax Court held that the taxpayer was required to take the assumption of the liability into income despite no corresponding deduction to the taxpayer. – The Form 8594 must be attached to each filer's timely filed Federal income tax return.