below is copy from costco.ca website , not by me
Just want to know if this is a major issues ?
I've used this software for 20 years without complaint. The 2021 version... I ran into 2 bugs, easily, one of course after I filed. This was clearly not tested with the same rigor of past years.
The first bug, is it hits a software error, through easystep when it gets to the Ontario annual filing. Since Ontario no longer does annual filing through the federal tax, this whole section should've been removed, and they had ample time to remove it.
The 2nd problem is in Form T2, section General Tax Reduction for Canadian Controlled Private Corporations, Line F. The calculated value is not pulled in from Line 440. This error caused my filed return to understate tax owing by 28%.
Reports of the bugs (first was already known), left me feeling they would do nothing about it.
The software is cheaper than an Incorporated accountant, but they've clearly dropped the ball on development and testing for 2021.