Can I upload a invoice that has been email to me in to quickbooks?

Hello, Wallace we, Welcome to the Community 👋🎉 You can't upload invoices from emails that have been sent to you, You can, however, attach the invoice that has been emailed to you to the invoice that you create in QuickBooks, But this means that you still need to create the invoice to attach the emailed invoice too. 

To attach the emailed invoice to the invoice, Open an invoice and to the bottom right you will see a paperclip for attachments > select this and browse for your saved Emailed invoice. Thanks