not sure what you sold or to whom, but assuming it's a taxable transaction, there is no direct way to handle the sale in Turbotax. you need to split the asset in two parts by cutting the cost and accumulated depreciation in half in the original asset entry worksheet and enter the other 50% cost and depreciation on a second. Then use one of then to report the sale.
you may want to provide more details so we can opine on the taxability of the transaction.