Thanks for getting back to us, @Laurabelle.
QuickBooks Self-Employed doesn't have a Customer Information page. To update your client’s email address, you'll have to manually enter it each time you create an invoice
In case you want to update your own email information, I'm also adding steps on how accomplish this task.
- Go to the Invoices menu located on the left panel of your QBSE company. In the upper right-hand, click on the Create invoice tab.
- Scroll down to the bottom of the page and choose the Edit Work Info tab.
- In the Your work info window, go to the Email section and enter the correct email address.
- Once done, click on the Save button.
To help you get started working in QBSE, I’m adding a link to view the list of our articles.
Moving forward, the new email address should show on the invoice.
Let me know the outcome after following these steps. I’m always here if you need more help