Dunning Levels - Setup Window 
Use this window to define a letter format for each dunning level in your company. There are three default letter formats that you can adapt to your company standards using the Crystal Reports software version for the SAP Business One application and the Print Layout Designer tool.
To activate the Dunning Levels – Setup window, do the following:
From the toolbar, click
(Form Settings).In the Form Settings – Main Menu window, choose
Administration 
Setup Business Partners Dunning Levels 
and
select the checkbox.
To access this window after you have activated the function, choose Administration Setup Business Partners Dunning Levels .
Setup Window Fields
Choose the required option. Choose All to use a letter format that combines all the dunning levels. |
Enter the number of days after which the dunning level takes effect. This field is disabled when the chosen dunning level is All. |
Enter the fee charged for a specific dunning letter. When the fee is related to the dunning level All, it is relevant only for the combined dunning letter. |
Enter a minimum balance amount for the chosen dunning letter. If the debt of the customer is lower than the minimum balance defined, the dunning letter is not issued, even if the dunning level is already effective. |
Calculates interest for the dunning level. |