I'm Ava from Shopify Support.
Updating your EIN is something our Financial Services team will be able to do for you internally! This is not something that is accessible through the admin normally, as it is vital the EIN on file is correct for tax purposes so it should not be changed often. Can I ask why you would like to change/update the EIN?
In order for the team to make this change for you, we’ll need to access your account. While we’re not able to provide account-specific support via the Shopify Community at this time, we’d be happy to continue assisting you through live chat, email, or callback. Please visit our Help Centre here and log in to your account to create a support request.
Since this is the next step I've marked this reply as the solution for the benefit of others who may discover this topic. Thanks!
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