Welcome to the Community family, @AaronZeff.

QuickBooks Desktop 2020 now offers the ability to combine multiple emails for invoices. It means that users can improve their customer service by combining all their invoices meant for a single customer into a single email without having to manually combine them outside of QuickBooks. 

Here's how you can do this in QuickBooks:

1. Click on File at the top menu bar.
2. Choose Send Forms. 
3. Select the invoices that needs to be sent.
4. Tick the Combine forms to a recipient in one email.
5. Hit on Send. 

Know that this feature does not work if using QuickBooks Payment links on the invoice. If you're utilizing the older version of QBDT, paying the invoices through the payment link, the invoices need to be sent and paid individually.

On the other hand, when it come to sending PO's this needs to be processed separately.

Moreover, our developers are always finding and considering new features to be added to the system. This way, we'll be able to cope with the functions that work best for your business. 

I encourage to visit our Firm of the Future site regularly, to be updated with our product enhancements and road-maps.

I got your back should you need anything else. Feel free to notify me by leaving a reply below. Have a good one!