You cannot "upgrade" from TurboTax Home & Business to TurboTax Business.
In fact, you will need both Home & Business and TurboTax Business; one to prepare your individual income tax return and the other to prepare the 1041 for the estate.
In essence, you need to keep your copy of Home & Business and then buy a copy of TurboTax Business (which, I believe, is also sold by Sam's Club).
