I purchased Business TurboTax. Having completed my 1041. It prompts me to do the state. What product do I need to buy?

[DawnC]

You already have TurboTax Business, so all you need is to add your state (whichever state you need to file the 1041 in) to that software.  You can do that from the State Taxes tab in TurboTax Business.

You still need a personal tax product to prepare your personal tax return, which is a separate product.   TurboTax Personal Tax

You can use any personal version of the desktop software.   However, if you use TurboTax Online for your personal return, you will need the Premium version since you will have a K-1 from the business tax return.