I ran the report "Open Sales Orders by Customer".

I added DUE DATE to the columns, and opened my date range up to start at on May 1 (so I could see sales orders that were created within the last 5 weeks - this should capture any open sales orders).

I clicked on sort by DUE DATE - but it is still sorting by customer name in alphabetical order.

And it shows all sales orders created, even with due dates in July (which I don't really want to see right now).

All I really want to see is a quick snapshot that shows the sales orders that are due to be completed by the end of this month (regardless of when they were created).  I am just trying to estimate remaining sales for the month, based on the sales orders that are scheduled to be complete this month....