My income is $3.33 more than the total amount in my t4. I can't figure out where this is coming from. It's a small amount but this must mean I made a mistake somewhere.

Do you have any other sources of income besides your T4 slip?  You also can select Income>Get Started to review the income section of your return.

If you are still unable to resolve this issue, please contact our phone support as they will be better able to assist you. This form will help you get the right number: https://support.turbotax.intuit.ca/contact/