Hello, @dayak412.

When setting up an agency in QuickBooks Online (QBO), make sure the Start date should be prior to the estimate's date.

If the sales tax amount didn't calculate after editing the tax settings date, I'd encourage you to contact us to make sure that your issue is addressed as soon as possible. Our customer care team has the tools, such as screen sharing, to dive deeper into this issue.

Please contact us through this link: <a rel="nofollow" target="_blank" href="https://community.intuit.com/articles/1145770">https://community.intuit.com/articles/1145770</a>.

Let me know if there's more I can help you with. I'm always here to help.