Why does my Quickbooks fail to work with Thunderbird?

Hi WEI-INC. Currently, Thunderbird is only supported inside of QuickBooks 2019. Refer to our article on Connecting your email to QuickBooks desktop. If upgraded to 2019 or higher, QuickBooks does support the plain-text version of Thunderbird within Mozilla. I recommend upgrading to the 2020 version to ensure you maintain supportability between your email client and QuickBooks software.

Please let me know if you need any further guidance I'll be happy to help. 
 

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Hi there, @TorreyLLC. 

Thank you for reaching out to the Community. Let me help you get your return address change as quickly as possible. You can change the address when sending your invoices and statements. 

Using the Send Forms feature won't change the address for all sent forms since you can select an email from the drop-down. You'll want to update the email address in the preferences instead.   

Here's how: 

1. Click Edit located at the top, and select Preferences.
2. In the Preferences window, click Send Forms on the left panel.
3. Click the Add button, and then add the email address.
4. Choose the Email Provider, and select OK.
5. Once done, click OK again 

Whatever you set up as the default address, it will be used when you send other forms on the transaction page. 

If you encounter an error when emailing transactions or reports, check this out: QuickBooks is unable to send your email to Outlook. This article provides solutions and detailed steps to resolve the issue.  

Don't hesitate to visit us here if you have other questions or concerns. Take care!