You change it with IRS in your Eservices account, and update your EFIN application with the new address.  Once youve changed it there, you upload the EFIN application Summary with the new address to Intuit and they will update your firm information in the program.

This article says its for Lacerte and ProSeries, it doesnt list ProConnect specifically, but I think its the same for all

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