Only active constituents can be used when importing revenue.  The constituents will need to be marked active. 

1.       Open the record of the constituent to mark as inactive.
2.       Under Tasks, click Mark inactive. The Constituent mark inactive screen appears.
3.       Select the reason code to explain the need to mark the constituent as inactive. 
4.       In the Details field, enter any additional information about the inactive status of the constituent.
5.       Click Save.  Return to the constituent record.