Currently, vet/rescue/breeders cannot edit microchips. Once an application is approved, the microchips are proactively registered with the vet/rescue/breeder's contact information. The chips are automatically added to the Fi Partner's account and can be found under Stock but are unable to be edited. See: What Does Stock, Active and Review Mean In My Fi Nano Partner Account?
A pet owner is able to edit their microchips, once the microchip is registered and approved. See: I Am a Pet Owner, How Do I Manage and Edit My Fi Nano Microchip Account?
If the owner reaches out and is having issues editing their account we suggest sending them: Why Can I Not Tap Continue on My Fi Nano Microchip Registration?