Hello
I was having the same problem until I found the solution. What you need to do is the following.
Scroll down in the interview section to where it says controls. Click on it which will open up a page labeled MaxBack controls
Scroll down to where it states election to include tax-exempt income for purposes of schedule 6.
There is a dropbox and you need to change the choice from let MaxBack decide to having it be blank in the dropbox then click next.
This is what I did and I was able to successfully submit my taxes.
I really hope that this will work for you.
