Can I want edit my e-mail statement when I send estimates or invoices to customers?

Hello there, @carefreemisting.

You'll want to go to the Account and Settings page and change your email statement from there. Le me show you how.

In your QuickBooks Online (QBO) account:

1. Go to the Gear icon.
2. Click Account and Settings.
3. Select the Sales menu.
4. Click the Messages section.
5. Edit the email statement of your invoice or estimate.
6. Click Save, then Done. 

Here's an article you can read for additional reference: Customize invoices, estimates, and sales receipts in QuickBooks Online.

You can also check this article in case you want to add logos to your invoice: Add, customize, or remove logos on sales forms.

In case you have other concerns, you can always leave a comment below. We'll be around to help. Have a great day!