@Jeby1 20% of your UCC will be available to claim as CCA. But you can't create or increase a rental loss with CCA. TurboTax will automatically calculate the amount of CCA that you can claim for the year, so it might be Zero if you are already in a loss position. You can also choose not to claim CCA for the year.
If you don't take the full amount of CCA for the year (or only a portion), the remainder will stay in your UCC to use in future years.
