This credit is an extremely pointless credit, for the most part. It is non-refundable and the number of people who fit the qualifications AND have enough tax liability for it to do them any good appears to be minuscule!
The amount of money, energy, paper, and training that goes into this maintaining this credit as part of our tax code is very hard to justify.
I do not recall ever encountering a taxpayer at our VITA site who qualified for this credit, but it could potentially appear on the certification exam, so I include this page for completeness.
In the unlikely event that we do get a taxpayer who fits the parameters of this credit, TaxWise should calculate the credit properly as long as you input the taxpayer's date of birth and disability status into the main information screen in TaxWise.