Entering Carryforward Information

I am in the Enter your Carryforward Information section of Turbotax under the Business Income and Expenses section.  It shows:

 

"Your tentative business credit carryforward from 2018 is $759.

If you carried back any of this amount to a prior year, enter only the carryforward amount that remains in the Carryforward Amount field below. If you used up all the credit, enter zero."

 

The fields presented are the unused credit that you are carrying forward, and the year this credit was first claimed. I'm assuming it's from my 2017 taxes for the "Qualified plug-in electric vehicle carryover," but I have no way of knowing where this $759 number presented in Turbotax comes from. A text search of my 2018 tax returns does not have "759" anywhere.

 

I have no way of finding out if I used up this credit, or how it works.  One would think that my 2018 Turbotax would provide the information needed to automatically have that information pre-selected here, but that does not seem to be the case.  The "Learn More" link is no help in letting me know what to enter. I would prefer not to miss out on this $759, but am not sure what to enter.