Resources OTIP Benefits Services: 1-866-783-6847 OTIP Benefit Services, Technical Support: 1-888-521-0023 Hours of operation: Monday to Friday 8 a.m. to 7 p.m. (ET) Client Services: 1-416-961-8800 Toll-Free (Canada & USA): 1-888-534-2222Email: info@oct.ca