When I try to set up my sales tax, I'm getting this error: An application error has occurred while processing your request Any idea on how to fix it?

I am receiving this error also.

Thanks for posting here and sharing this concern with us, @hulljohnd and @tlp97,

I want to make sure this is resolved immediately for you. While there is currently no reported issues or open investigations for the sales tax preference in QuickBooks, let's try to diagnose this issue by running some basic troubleshooting on your computer.

First, use a different browser and try to set up the Sales Tax preference and see if works.

If not, you can use a private window and login to your QuickBooks account in there. Unexpected issues in QBO are most of the times affected by the large data in the cache. This is because the regular browser will constantly accumulate data and will not remove its history automatically.

The incognito mode will not save any history, so it's a great place to identify issues in the browser. Use these keyboard shortcuts to launch a new private window:

• Google Chrome: press Ctrl + Shift + N  
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

If it works, clear the cache to resolve the issue in regular browsing.

Please update me with the result after trying the troubleshooting steps. I want to make sure this application error resolved. I'll also be right here if you need further assistance. 

Thank you for the tips. I opened an incognito tab on Firefox for Mac, but I still get the error. I also tried it in Chrome and Safari and also got the error. Thanks.

Thank you for the tips. I tried it in incognito mode in Firefox for Mac (where I had the error), but it still gave me the error. I then tried it for the first time in Chrome and Safari and also received the error in both places. Thanks.

Thanks for getting back to us here, @hulljohnd.

To verify, are you using the QBO app when setting up the sales tax? If so, you'll want to reset the app by going to the Help menu at the top, and then clicking Reset App Data.

If you're not using the app, I recommend contacting our Customer Care Support so we can investigate further. This way, we can check the cause why you're unable to set the sales tax.

Here's how to reach out:

1. Go to Help at the top.
2. Select Contact Us.
3. Enter your concern on the field. QB Assistant will provide link to some answers.
4. Type "I still need a human", then tick the Get help from a human button.
5. Click Chat with us to start a conversation. See the attached screenshots below.

In case you need help with other tasks in QBO, you can browse this link to go to our general topics with articles. 

Please know that I'm always here if you still have questions or concerns with sales tax. Take care and have a wonderful weekend.

I am having the same issue. I cannot log into the sales tax. I can't post the transaction to the sales tax account and can't close the books. I have tried all that you listed above and still nothing. I was using the sales tax functions in all my clients QBO file just fine at the end of December.

THis is the error message: An application error has occurred while processing your request

Hello, bexpress. 

I'm grateful that you took the time to follow all the troubleshooting steps provided by my colleagues above. In this case, I'd encourage you to reach out to our customer support team. They have the tools to pull up your account in a secure session and help you identify with this unusual behavior occur in QuickBooks.    

Here's how: 

1. Sign in to your QuickBooks Online company.
2. Go to Help (?).
3. Click Talk to a human.  
4. Choose Talk to a human.  
5. Enter your concern.  
6. Tap Contact us. 

You can contact us every Mondays to Fridays from 6: 00 AM PST to 6:00 PM PST. Then, until 3:00 PM PST every Saturdays.    

I've also included here some articles about sales taxes in QuickBooks for your future reference:  

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

Please update me on how the call goes, as I want to make sure you're taken care of. Have a good one!

I had this same issue and after following all the recommended suggestions online, which did not work, I thought I would try switching to the old layout, and low and behold, it worked!