Did you transfer in your info from last year? You may have had some medical expenses that carried forward into your current year return.
Do you have any Premiums paid to private medical/hospital plans on your T4 or T4a? Those premiums are deductible as a medical expense, and will show up on your tax summary as Line 33099 Medical Expenses for self, spouse/partner and dependant children.
What if I don't have premiums paid in box 85, no valid medical expenses, how do I remove the amount in line 33099 that appears in my tax summary? I have the same issue as the initial question, how do I fix it? I am using the Turbo Tax online version.