Hey steve-waterman,
It's vital for all your tax forms to be produced and filed accurately, even for prior years. The payroll modules available in QuickBooks Online are designed to make this a simple and stress-free experience, so you have more time to focus on running your business. If you're unable to upload prior years on the CRA website, please contact them for assistance. Otherwise, our payroll expert team can take a look at your account to help you obtain your T4s. Choose from the following methods to get in touch.
Phone and Chat: Click Contact Us to learn how to reach phone and chat support.
Schedule a Callback: click (?)Help in the upper right > click Contact Us > explain your situation > click Let's Talk > choose Get a callback (Note: Callback hours are the same as regular phone hours.)
Social Media: Facebook, Twitter, and Instagram from Monday to Friday between 9 a.m. and 8 p.m. ET
Let me know if there's anything else I can do to help!