How do I sign in to intuit ID to be able to email an invoice. I have desktop

Hi Lefty66, you need to connect your email account through the Send Forms preferences to email invoices from QuickBooks Desktop (QBDT) using your Intuit ID.

To do this, go to the QuickBooks Edit menu, then select Preferences, click Send Forms, and hit the Add button under My preferences. The system will prompt to enter an Email ID, choose an Email Provider, and click OK. Once done, QuickBooks will require you to log in using your Intuit credentials to finish the setup.

You will also be able to send other transactions after this process. For more information, please refer to this article: Email sales forms, invoices, and statements in QuickBooks Desktop.

Don't hesitate to reply here if you need more assistance.