Thanks for visiting the QuickBooks Community today, Dola.
Yes, you'll be required to have a supported and active version of QuickBooks Desktop (QBDT) to send email invoices.
Furthermore, your access to QBDT Payroll Services, Live Support, Online Backup, Online Banking, and other services provided by the QBDT 2020 software will also be discontinued if you're using an unsupported QBDT version. This also means you won't receive critical security updates.
For more information, kindly refer to this article: QuickBooks Desktop service discontinuation policy.
Additionally, you can visit this resource if you need to upgrade your QBDT software to a supported version: Upgrade QuickBooks Desktop Pro Plus, Premier Plus, or Enterprise.
If there is anything else I can do for you, please don't hesitate to add details below. I'll be there to help. Stay safe, and enjoy your day.
