You've applied a bill payment to the wrong vendor
If your company data file is changeable, you can simply delete the payment. If your data file is unchangeable, you must first reverse the payment. Then you'll have to enter a new bill payment, making sure to apply it to the correct vendor. If you had already reconciled the first payment, be sure to mark the new one as reconciled as well.
For more information about correcting vendor payments, see Finding, deleting and reversing Pay Bills transactions. For step-by-step procedures for deleting bill payments, see To delete a bill payment. For step-by-step procedures for reversing bill payments, refer to To reverse a bill payment.