I'm replying to my own message. I finally got the form to work correctly. On the Net Capital Losses I entered my 2019 Net Capital Losses in the column 'Claimed in 2020'. the result was that the 'Balance end of year' data box now reports a 0.00 value. Back to T1 line 25300 and my Net Capital Loss in now shown correctly. The key is that you must enter the amount you are claiming in the column 'Claimed in 2020'.
