Log into your Philadelphia Tax Center profile. Choose "More options" to access the "Payments and returns" tab in your dashboard.To complete online returns and payments for this tax, use the Philadelphia Tax Center. For help getting started, see our tax center guide. This is the easiest way to electronically fill out the forms and prevent losing any information that you've entered. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer. Both the seller and purchaser of a group of assets that makes up a trade or business must use Form 8594 to report such a sale. In an asset sale, the new owner purchases the business's physical assets. The seller retains all rights to the legal entity.