Based on information at CRA it appears that you must apply for the Eligibility Certificate from the Ministry of Education in order to make this claim.
Line 68 – Saskatchewan graduate tuition tax credit
You can claim this credit if you were a resident of Saskatchewan at the end of 2018 and you met all of the following conditions:
- You met the necessary qualifications to receive a certificate or
diploma from an eligible program at an eligible educational institution.
- You applied for and obtained a Graduate Retention Program
Eligibility Certificate from the Saskatchewan Ministry of Advanced
Education.
You will be entitled to credits over a seven-year period based on
your eligible tuition amount, beginning in the tax year shown on your
Graduate Retention Program Eligibility Certificate, as long as you file a
return as a resident of Saskatchewan for each year of your entitlement.
