Open the ledger of the entity type that you want to design reports for.
Select Reports > Reporter > Design Client reports…
All Master level reports and Practice level reports are available in addition to those reports designed at the Client level for the selected client.
When you work in the Report Designer at the Client level, all the changes you make or any new items you add will only be available for use for the specific client ledger you opened in Report Designer. For example, any reports you create or save at the Client level will only be available for use for the particular client the report was created for. You will not be able to use or view Client level items for any other client other than the one the item was created or edited for.
If you want an item to be available for all client ledgers in the practice, you will need to create it or save it at the Practice level.