A levy can only be deleted if it has not been used as part of Period Close calculations.
Go to the Admin menu, then click Levies
...
Perform the search and identify the desired levy to delete.
Highlight the row and click on the Delete
...
button.
This will bring up a confirmation message.
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Click OK
...
if you wish to delete the levy, or Cancel
...
if you wish not to.
If the levy has been used, a message will appear to advise and the levy will not be deleted. A new levy with an Effective Date in the future should be created.