Hi Harshi, may I know if you're referring to sales tax rates that are missing?
If so, we're aware of the situation, and our engineers are working to restore full functionality as soon as possible. In the meantime, you'll want to log out and back in or try a different browser to restore the missing sales tax column.
For any transactions created yesterday between 8:45 and 11:15 AM PT, you'll also need to open and re-save them to update the tax amounts.