I there I have a new email address how do I add another email address so quickbooks lets me send invoices and recipts to quickbooks from it

Currently, QuickBooks Online only allows one email address per company file to send invoices and receipts, Khiggin.

If you'd like to use your new email address to send these sales forms, you must replace your current email address in the Customer-facing email field with the latest one. To do this, please follow the steps below:

1. Open your QuickBooks account.
2. Go to the Gear icon, then select Accounts and Settings.
3. Select Company, then navigate to the Contact info section.
4. Untick the Same as company email.
5. Then, update the email address from the Customer-facing email field. 
6. Once done, click Save and Done.

For more tips on customizing invoices and sales receipts in QuickBooks, you can check out this article: Customise invoices, estimates, and sales receipts in QuickBooks.

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