During 2023 I owned shares of a U.S. corporation that entered into a merger agreement. Under the terms of the agreement, I received cash and a fractional share of the acquiring corporation's common stock for each share of stock I owned prior to the merger. My 1099-B does not reflect the cost basis of the original shares I owned nor any gain or loss on the transaction. How do I enter this transaction in Turbo Tax and shouldn't the capital gain/loss equal to the difference between (1) the sum of cash received and the market value of the shares received in the merger and (2) the tax basis of the stock originally held?