I am getting the same error message, my spouse filed just fine. I am getting this message across multiple software as well.
Quite frustrating as it doesn't say what problems are in my return. Neither TuroTax or HRBlock report any errors in my return and I've printed it out and manually gone over every entry and it seems pretty straight forward.
I only have a T4 and T5 and RRSP to enter this year, I cannot believe how difficult they make such a simple task.
@leaherridge and @wynhou Issues like this are usually resolved by revisiting and completing the Review section of your return. If completing the Review steps doesn't solve the issue, please contact our phone support team for assistance. by following this link https://turbotax.community.intuit.ca/community/product-information/help/contact-us/00/873707