In the year you acquire a depreciable property, you can usually claim CCA on only one-half of your net additions to a class. This is known as the 50% rule. TurboTax follows this rule for new additions.
What properties are not subject to the 50% rule?
If you want to claim more, you can enter a different amount at the end of the CCA section of the interview.
To calculate the CCA manually, get the self-employment form that applies to you from the CRA. Manually calculate the CCA for the entire class on the CRA form.
Repeat the process for each class in which you have property that is exempt from the 50% rule.
You can find most CRA forms and publications on the CRA's Forms and Publications web page.