Unfortunately, the creation of email groups is not supported with scan to email. However, you can do one of two things. Create a DL and use the DL as a destination or you can create a preset with the list of emails selected to avoid either entering/selecting the same email list every time. To create a preset:
1. Launch Scan to Email
2. Add the list of emails from the saved destinations or by entering at runtime
3. From the Gear menu select "Save as New Preset"
4. Enter a preset name (ex. Group_Name)
5. Next time you load the app and want to email the same recipients select the preset you saved.
So from the Gear menu select "Load a Prest" and select the preset you saved. The emails automatically populate in the destination list.
Hope this helps!