I inputted some incorrect information on one of my forms, the 1099div. now turbotax thinks I own a retail business. How do I get back to the form in order to change info?

As long as you have not filed your tax return, you can revisit any section to make changes using the topic search feature in TurboTax Online. On the left-hand side go to Tax Tools>Tools >Topic Search or Topic List. Then type the section or form that you need to update in the search box and click Go.