My sales tax is blank. Last week it showed the entire 2020 year. Any clues?

Hi there, jean17.

Issues with your browser can sometimes cause behavior like this. Let's try some quick browser troubleshooting to fix the missing sales tax in QuickBooks Online (QBO).

First, use a private browser. Since this doesn't store data in the cache, it the best place to isolate browser issues. Try these keyboard shortcuts depending on the browser you're using:

• Google Chrome: Ctrl + Shift + N
• Microsoft Edge: Ctrl + Shift + P
• Firefox: Ctrl + Shift + P
• Safari: Command + Shift + N

If this works, I recommend you go back to your regular browser and clear its cache. This will remove the log files and start with a clean slate. Otherwise, you can try using other supported browsers to be thorough.

Also, may I know the exact error message? This will help me identify the accurate solution for the said error. 

To give you additional information on how sales tax works in QBO, check out the following articles:

• Sales tax in QuickBooks Online.
• Set up your sales tax.

• Set up and use automated sales tax in QuickBooks Online.

The Community is always open if you have other questions. I'll be around to help. Wishing you a great day ahead.

This workaround does not work for me.  Same "an application error has occured" message and am unable to select a sales tax rate when invoicing. Only able to default based on current location.

Thanks for following this thread, @dth256a. 

At the moment, the option to change the default tax rate from Based on location to Custom Rates is unavailable. 

QBO US version uses the Automated Sales Tax function, and will always use the Based on the location tax rate. For now, you'll need to manually click the drop-down list and select the custom rate when creating your sales transactions. 

Here are some of the additional guides when filing and paying your sales taxes in QBO:

• Check how much sales tax you owe in QuickBooks Online
• File your sales tax return and record tax payment in QuickBooks Online

Feel free to post again if you need anything else. I'm always around here to help.