Why isn't my UCC Balances being carried over from last year (2019)? Everything else did

This information is not transferred. Check this link for the list of information that transfers from the previous year's return:

https://turbotax.community.intuit.ca/community/importing-transfering/help/what-information-is-transferred-from-my-previous-turbotax-return/00/873429

I hope this was helpful