Thanks for taking the time to scour our Community space for potential solutions. If you haven't encountered this yet, this solution will prove useful in resolving the federal tax calculation issues, MVHP_Gabe.
Let's make sure we set up your email service with QuickBooks Desktop so you can send invoices using the default email address. Let me guide you on how.
- Go to the Edit menu.
- Select Preferences.
- Choose the Send Forms from the left panel.
- In the My Preferences tab, select the email service you want to use.
- Click Add, then enter the Email Id.
- Select the Email Provide from the drop-down.
- Click OK, then select OK from the Preference window.
Here's an article you can read for more details: Set up Email Service. You might also want to read this article to verify that an invoice was emailed and read by customers.
In case you need help with other QuickBooks Desktop-related tasks, feel free to browse this link to go to the page. It has our general QuickBooks topics, video tutorials, and Community answers: View all help for QuickBooks Desktop.
This is the best way we can do to resolve your issue as soon as possible. Should you need any other help with QuickBooks, please don't hesitate to comment below. I'm here to assist you anytime.