What does this mean, "I use the quick method to calculate my GST/HST remittance"

[a-cogle]

I used Wave when I created the invoice.

[TurboTaxSusan]

This CRA website explains the Quick Method of Accounting for GST/HST: https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4058/quick-method...