I have just received a reassessment for my 2015 taxes from Revenue Canada stating that I am due a refund.
The error is in the form T1032 - Step 5 - Line 1 for the Transferee.
The program did not transfer "Total tax deducted from all your slips" amount to line 1.
This resulted in a lower amount transferred to Line 437.
If you have not received a reassessment due to this error check your 2015 return and if affected file a T1 adjustment form.