I'm glad to have you join us in the QuickBooks community! Using QuickBooks Self-Employed is a great way to track your income, expenses, and sales tax collected for your work. I'm happy to go over this with you and let you know how to get further support if needed.
QuickBooks Self-Employed calculates your sales tax based on transactions entered into the program. Once you've set up the sales tax codes you need, it's as simple as adding them to transactions and beginning to record them. You'll be able to see details about sales tax by running reports such as the Tax summary and Tax details reports, accessed by clicking the Reports tab in the left menu when using a browser. These reports should also be accessible through the app version. All you need to do is choose the year you'd like to see data for and run the report.
Learn more about sales tax in QuickBooks Self-Employed, including how to set it up, here: Sales Tax overview
To discuss more of your options with the dedicated QuickBooks Self-Employed team, check out this article to see how to get in touch: Contact QuickBooks Self-Employed Support
Wishing you a wonderful day!
On a business income transaction/deposit, can I manually add a custom HST/GST amount?
For my line of work, the HST collected is not calculated on final total but on a subtotal amount in the middle.
QuickBooks Self-Employed is focused on providing the features and insight required to keep track of your income, mileage, and taxes. The system is designed to further streamline the separation of business and personal transactions, by eliminating the need of complex entries in the background. Recording specific adjustments to tax returns is something best done outside of QuickBooks Self-Employed. To discuss more of your options with the dedicated QuickBooks Self-Employed team, check out this article to see how to get in touch: Contact QuickBooks Self-Employed Support
Hope this helps!