Hi there, ehalai.
The inclusive tax setup is common in the UK version of QuickBooks. With QuickBooks Desktop Point of Sale (US), the option of creating sales transactions that are inclusive of taxes is currently unavailable. For the time being, you can manually adjust the sales amount to $90 with $10 of tax in a total of $100.
I can see the importance of calculating your sales transactions with inclusive taxes automatically. I'll take note of the feature needed and submit feedback to our product developers. Rest assured our they're working nonstop to enhance the product and deliver the best experiences for all QuickBooks users.
To learn more about sales taxes in QuickBooks POS, you can open this article: Set up sales tax in QuickBooks Desktop Point of Sale.
You can also get more tips about handling your other sales entries through this link: Topics about your company's income and customers.
Let me know how else I can help you with your sales and tax entries. I'm more than happy to help. Wishing you a good one!
