My son is autistic and was approved Child Disability Benefit when i submitted for T2201 previously. Where do I apply for CDB in TurboTax for 2017 tax return?

My son is autistic and we were approved for the Child Disability Benefit when i submitted for T2201 previously. Where do I apply for CDB in TurboTax for 2017 tax return? There must be a checkbox or something for the CDB, but I cannot find anything.