1.    In Student Billing, open Configuration
2.    Click Products and Billing items
3.    Verify that the billing item being used with School Store Manager has start and end dates that include the dates of the transactions being loaded.  You may need to edit an existing billing item's dates or create a new billing item.
4.    Save and close the billing item
5.    In Configuration, School Store Manager, open the store
6.    On the Options tab, select the appropriate billing item for Charges applied to item (and Taxes applied to item, if applicable), ensuring the billing item with the correct date range is selected
7.    Click OK