Hi there BCI-bookkeeper,
It's vital that information on your forms be correct so that you can file them correctly with the government. QuickBooks Desktop payroll allows you to create forms such as T4 and T4A at the end of the year in order to be able to report earnings to the government for employees and contractors. I can point you in the right direction for assistance with T4A forms.
For help in getting the information correct in your T4A forms, I recommend reaching out to the QuickBooks Desktop support team. They'll be able to view the specific errors you're receiving with you in your software in order to help you get those numbers up to date for your vendors. You can reach out to them using one of the methods provided in the QuickBooks Desktop software support policies.
If you have any other questions, feel free to reach out here.