You might want to contact Support (link below) for this issue,
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
To the best of my knowledge, if you answered the preliminary questions correctly in the K-1 section of the program, then the only way to change the treatment from passive to nonpassive would be in Forms Mode directly on the K-1 in Section C.
