Line 62140 is your Credit calculated from Schedule ON248-A. Is what you would have needed to complete if you were single. 

 TurboTax Online you will need to go to the "Provincial" section on the left-hand side of the screen and verify that you have claimed your credits properly.

If you are still having issues please contact our customer service for assistance.

https://turbotax.community.intuit.ca/community/product-information/help/contact-us/00/873707