After a diligent search yesterday, I found that as long as your asset is properly listed and the percentage listed, the software will do it by itself. You will find it all properly listed on the T2125 form but there is no place to input it.

@Timpot35 What are you claiming CCA for? Self-employment, rental, employment expenses? Is it for a vehicle or some other type of asset?

What do you mean, there's no way to input it?

What if I have new stuff to put in and how do I decide how much CCA allowance do I deduct from the stuff that's already on there?

This is for self-employment CCA. I've been self-employed for 10 years and this is the first years I can't put it in, 

Just letting you know I found it. It was in "fixed assets".