Glad to hop in and provide some insight about entering transactions in QuickBooks Self-Employed(QBSE). This way, I can guide you accordingly.
This will depend on the transaction you enter into the system because there are different ways to enter log an item. Though, you have an option to record the amount of taxes separately to avoid confusion in the future.
Here's how:
Go to the Transactions menu on the left pane.
Click Add transaction.
Enter the appropriate Date, Description, and Amount in the field.
Additionally, I suggest that you consult an accountant. They can help you choose the appropriate category in Schedule C to register the transaction.
Furthermore, you can also create new transactions directly from your images of receipt. By doing this, will save your time in entering multiple transactions. For more details, check out this link: Record or attach expense receipts in QBSE.
Feel free to visit these articles below to learn more about reports and categories in QBSE: