Use form FTB 3885, Corporation Depreciation and Amortization, to calculate California depreciation and amortization deduction for corporations. 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.Many Buyers will require that a sale be structured as an Asset Purchase in order to avoid responsibility for prior liabilities or expenses of the business. Asset purchase agreements can be a useful way to create a new business while leaving unwanted resources and potential issues with the seller. The purchase agreement must be carefully drafted and customized for these economic details.