Had to authenticate the phone through the Verizon website but they sent the
code to my wife's number instead
Sounds like your wife's number is associated with the account owner.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
Im looking in my account but dont see an option to authenticate my phone. What did you have to do to authenticate your phone?
Go to your myverizon.com and look for switch or upgrade phones then it will
ask if you're upgrading or switching hit switching and it will prompt you
My myverizon page looks different then the way you described yours. Also, it doesnt ask if I am switching or upgrading but for the reason I am changing devices. Lost/stolen, replacement device, device received from other source etc. Im guessing this is because I am on a prepaid account.
When I tried to re-enter the IMEI it tells me “The Device/SIM ID you entered is already in use. Please try again with a different Device/SIM ID.“