Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Generally, both the purchaser and seller must file Form 8594 and attach it to their income tax returns (Forms 1040, 1041,.This letter should include the complete legal name of the business, the EIN, the business address, and the reason for the cancellation. Our staff may provide you with information regarding certain City, county, state, or federal requirements. If you are calling from outside of the 48 contiguous states, please call 1- or complete our online form to reach our Customer Service Center. Buyer's accepted accounting practices.