I have an update, Geralyn.
To restore the missing sales tax column, you'll want to log out and back in or try a different browser. For any transactions created yesterday between 8:45–11:15 AM PT, you will also need to open and re-save them to update the tax amounts.
If the issue persists, please reach out to our QuickBooks Online Live Support team for immediate assistance.
Please let us know if you have further questions. We're here to help you anytime.