Good day to you, @dsab.
I understand that you require a sales tax computation in QuickBooks online based on your area. I also realize you'd like to prevent it from being calculated based on the customer's location.
Moreover, my colleague will explain and has already responded to your query from a different post. Please visit this link for your reference: https://quickbooks.intuit.com/learn-support/en-us/taxes/re-wrong-sales-tax-all-work-is-done-in-my-sh...
I'm also adding this article for additional information about how cash and accrual accounting affect sales taxes in QuickBooks Online.
Thanks for reaching out to us today. This forum is always open for your QuickBooks conversion concerns, and I am also here to help. Have a nice week ahead!