Hi Jean, welcome to the Community. If you can’t see the tax column on your expense page, it is likely because the Amounts are dropdown in the Expense page is set to Out of Scope. We can change this to Exclusive of Tax or Inclusive of Tax, as this will make the tax fields appear so you can select a rate.

If your sales tax column is missing even though it isn't set to Out of Scope, it may be a display issue caused by the browser. We can troubleshoot your website by trying to log in to QuickBooks using a private or incognito window.
Moreover, If the taxes still don't appear in the private window, we recommend contacting our Live Support team. They have the tools to look deeper into your account settings and find the root cause of this layout change.
Please let us know if you have any other questions or if there is anything else we can help you with.