I entered a long term transaction into the system, an investment that started December 2019 and concluded April 2022.  I did not receive a 1099 form for the investment.

I'm attempting to update form 8949, Copy 3.  Line C has several short term transactions imported from my broker.  For the long term capital investment, I selected to override, selected Line F and entered the information.  

In the forms list, Form 8949 has a notation next to it stating "(Not Done)" and all of the text that I entered is colored RED.  

What is needed to save this entry?