I have changed it every where I can find it and everything looks great except in the email it still says Estimate. Can anyone please tell me if there is a place to edit this. Thanks for your help!
If this is an existing email, it cannot be edited directly. However, you can modify it on the estimate and send the estimate again.
You can also edit it for all future estimates in "Estimate settings" under "Invoice customization" in the settings (at the bottom of the menu).