How can I take American Opportunity credit for foreign university (Cambridge) with no EIN, only fedID?

My Daughter attends Cambridge University in UK and I have always taken American opportunity credit for this foreign school using the US FedID for the school but this year turbo tax is asking for EIN which I cannot find for the foreign school.  Where can this be found and is it actually necessary? (Have the rules changed this year?) The school does not issue a 1098-T as it is a foreign school but that is not the problem, only this new EIN requirement to get the American opportunity credit. Please advise.