Can you explain why I have been notified that the age deductions on my 2016 return are incorrect? Why was the incorrect amount used?

[murraybowes]

CRA has advised that the age deductions (federal & provincial) entered by Turbo Tax were incorrect. I now owe a balance, with interest.

[TurboTaxMary-Ann1]

There are many reasons why your refund may be different than what you were expecting;

https://turbotax.community.intuit.ca/replies/3023973