Intuit will send you an email containing a link for submitting your documents, safacc20. I recommend checking the inbox of the email linked to your account.
When you find the link, it'll direct you to an application where you can upload your document for the case. You can also access this application via the in-product banner at the top of the page or through the important notification on your Payroll Overview page.
Once you've successfully uploaded your documents, a confirmation window will appear in your QBO account.
For more information regarding FINTRAC, refer to the article: What you need to know about FINTRAC. You can utilize the jump links to navigate to specific questions.
For future help, I'll be sharing these resources that'll guide you in using the resolution center and when to record customer payments in QuickBooks:
We’re just a click away if you have additional questions related to FINTRAC.