ACCEPTED state:

1. If your manifest and PARS are both accepted, cancel the manifest completely.

2. Once it shows Cancellation Accepted status, edit your manifest and PARS  and select the correct Carrier code on the dropdown menu.

3. Click save for both manifest and PARS and send it again as ADD.

REJECTED state:

1. If the manifest and PARS are on a rejected status, directly change your Carrier code, click the drop down on the carrier/SCAC box and select your carrier code. Click save for both  manifest and PARS and send it again as ADD.