Hello steve-rj-campbel,
QuickBooks Self-Employed makes it easy to send invoices to your customers to make sure they have the information they need when they're purchasing from you. Verifying that you're entering the proper email is the perfect way to start troubleshooting this situation. Since you're certain you have the correct information entered, I've got another troubleshooting step to suggest for you.
When the proper email is entered, but a customer still isn't getting the invoice email, it could be something with the customer's email setup. In this case, have your customer double check her email settings to make sure that emails from QuickBooks are whitelisted in her email account, meaning that the email provider won't flag them as spam or junk. Have her also check the spam or junk folders to make sure that's not where the email ended up this time around. She can also review the following article, which talks about whitelisting Intuit and QuickBooks emails: Receive important email messages from Intuit
If she's still having trouble after that, feel free to get in touch with the QuickBooks Self-Employed team by following these steps in your account.
- Select the Assistant feature.
- Type and enter talk to human.
- Follow the prompts.
I hope that helps! :)