The individual passed away in their 65th year prior to their birth date. Turbo Tax 2017 calculated the Age Amount tax credit on line 301 of Schedule1 and on line 5808 of ON428. The return was assessed by the CRA and the Age Amount tax credit was reversed. Now the estate has incurred additional monies and assessed arrears interest.

I would have been helpful if the program had  been triggered to see the date of death and date of birth and know the Age Amount was not allowed as the individual had not attained the age of 65 prior to their death.

There is not a lot of help with this on the CRA website or other searches I conducted.