Hi, thanks for providing the steps to reproduce. I’ve tested the described problem on multiple browsers (Chrome, Firefox, IE9,10) and could not reproduce the issues. I’ve used WordPress 4.3.1 and Educator plugin 1.6 to test.
Could I kindly ask you to provide the following information?
– The browser name and the version number
– The WordPress version
– The Educator plugin version
– The OS
– If possible: php version
Also, could you please do the following:
Open the developer tools in Chrome and switch to the “Console” tab, reload the page. Try adding, updating, and removing the tax rates. Please check if something is getting displayed in the console (e.g., errors or some messages).