@krenaud2004 - Did i miss something in my answer?

It was an application error.  I abandoned the return and started a new one and then it calculated the Ontario tax correctly.  That is not something you find on a t4 slip.  The app calculates it.

Do you have your Tslip on hand?  If there is a box missing or incorrectly applied, then apply the correct amount in the appropriate boxes on the slips.

• To edit your Tslips, go to your Income tab then drop down to Tslips and find the appropriate slip and edit the slip accordingly. 

Also, double check with your employer as well as the CRA, if there is an amendment that needs to be made, you want to make sure everyone is on the same page.