By following the given path you can update the Receipt no, Receipt Date,Payment mode and the Payment amount to another fee type or another installment

Finance --> Approvals --> Update Fee Payment Details --> Select the Branch and Search the student --> Click on Edit against the payment for which would you like to make the changes --> Update the required details --> Save

Note:- For online payments only Receipt no update is allowed,for remaining payment modes you can change Receipt no, Receipt date,Payment mode and also payment adjustment to other feetypes.