How do I link my email to send invoices

Welcome to the QuickBooks Community, micmcd80.

Linking your email to send customer invoices in QuickBooks Online is easy. QuickBooks uses your Gmail account to send invoices directly to your customers. It's important to note that you can only connect one Gmail address, but you can use the same Gmail address for multiple QuickBooks accounts. I'll be glad to walk you through the steps:

1. Create a new invoice or open an existing one.
2. Fill in the required information in the invoice fields.
3. Click on Save and Send to open the preview window.
4. Select the From ▼ dropdown, click Add Gmail address, and choose Connect Google account.
5. Sign in to your Google account when prompted.
6. Grant permission by selecting Allow.
7. Your Gmail address now appears in the From field.

Take a look at this link for further information: Use your Gmail address to send invoices in QuickBooks Online.

You can also explore this article that will save you from having to monitor customers' invoice due dates: Send invoice reminders automatically or manually in QuickBooks Online.

Please get back to me if you have any additional questions concerning linking email or other concerns in QBO. I'm here to help.