I have the same issue -- using Windows 10 version of Turbo Tax Premier. I am trying to add information on form 1099B whether sales are Long or Short (all of the rest of the data was successfully imported). Sometimes I can get 5 entries done before the message "not responding", sometimes it is 1 entry. I was able to do over 500 changes in the beginning -- now I get the "not responding" message quite often and I have many more changes to make. I have defragged and checked for updates already
