When submitting my daughter's taxes, we entered her tuition as a student and clicked - "Done with Tuition". A screen popped up stating that she did no qualify for the Canada's Worker Benefit - which is correct. We did not attempt to claim this as she does not meet the criteria.

We thought her return seemed quite high but trusted the software. We just received a notice that we had a calculation error and they had to change. It states that we claimed the CWB $1, 731.56 and they changed it to $0.00. We looked back on the detailed paperwork and yes, the amount was on line 45300 indicated the amount.
We are glad that this error was caught and she did not receive the large return and then need to pay in back in a year! This is an issue and should be addressed.