The steps to remove an in school payment are:

1) In the search bar, type in the family name or family id number
2) On the family main page, click the payment to be voided.
3) Click on the Cancel Payment button
4) Click Apply Late fee
      Select Yes or No to apply fee
5) Click Send email
      Click on the Yes to email button to send email to family
6) Click Reason to cancel
       Type in an explanation for cancelling the payment, ie payment applied in error
7) Click Save
8) Click Close