error message when I edit and save a quote. Convert it to invoice and try to edit and it gave the same message. “ Missing Required Tax Line. Unable to save transaction.”

Let's run through some troubleshooting steps, as this may be related to your browser, Tlightsey21.

An overloaded cache can sometimes disrupt your browser's functionality. To resolve this, let's clear your cache, which will help the system run more smoothly and accurately identify any webpage problems. This step ensures that the most up to date versions of web pages load properly, while using updated and supported browsers guarantees access to the latest features and enhancements.

Once you've completed the troubleshooting steps mentioned above, please create a quote again and convert it into an invoice to check if you can successfully edit the transaction without getting an error.

When everything is functioning properly, you can then process invoice payments from your customers and record them in QuickBooks.

Also, if you need help with managing transactions and ensuring the accuracy of your account data, feel free to reach out to our QuickBooks Live Expert Assisted team! They are ready to offer personalized support and guidance to improve your QuickBooks experience and assist you in achieving your financial goals.

If you have any further questions, please feel free to comment below. We're here to provide further help!