What reports does Quicken Deluxe provide

I am not aware of a list of reports, but obviously you will lose business-related Reports and reports included with Premier.  The Premier reports not in basic have to do with capital gain estimates for sales scenarios as I recall.  If you no longer need business reports then I believe Deluxe is typically more than enough for most investors...and if you wind up wanting something from Premier you can always upgrade at that time.

The H&B - related accounts and transactions will be available in Deluxe, but you won't be able to use the H&B accounts and functions to record new customer invoice transactions, for example.
But you'll still be able to review transaction reports including H&B transactions, should you need to look up an old customer's records.