Under the "Deductions" tab > "Claims for Dependents" > "Disability Amounts Transfer" then click "Enter credit info". Check the box "Disability amount transfer" and continue. Answer yes in the drop down box and provide the amount of childcare claimed by you in the first open data field. The next three entries will be zero, and continue.

You can confirm the transfer amount under "Deductions" > "Deductions Summary", "Other amounts.