Anyone experiencing this morning Error code 600 appears when trying to raise an invoice using the 0% vat subcontractor code.

The error can be due to a temporary browser problem, Lisa.

I can guide you through the browser troubleshooting process to resolve the error you encountered when raising an invoice using the 0% VAT subcontractor code in QuickBooks Online (QBO).

First, sign in to your QBO account through your browser's incognito mode. To use incognito mode, follow these steps for your browser:

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

Once done, apply the 0% VAT subcontractor code again in the invoice. If this works, proceed to clear your browser's cache. This will help the program run optimally and avoid future issues. Additionally, you can use other devices and supported browsers to ensure everything works as expected.

For future reference, check out this article about submitting VAT returns in QBO: Submit a VAT return to HMRC using MTD in QuickBooks Online.

Let us know if you have further updates about the error code you encountered when raising an invoice with the 0% VAT subcontractor code in QBO. We're committed to offering ongoing support.