Youd need to update your Firm name attached to your EFIN with Eservices and then print out your EFIN application that shows the new name and upload that to Intuit so that they can make changes to your account.

Whether youd need a whole new EFIN since youve changed to an LLC, Im not sure.

Heres the instructions for sending Intuit your updated EFIN application

https://proconnect.intuit.com/community/license-information/help/register-your-efin-with-intuit-befo...