How to E-File as a Power of Attorney for Incapacitated Person

I would like to know how to e-file in the capacity as a power of attorney (POA) for filing a federal income tax return.  The signature line of Form 1040 only permits a signature for the taxpayer or for a paid preparer.  As a POA, I would not qualify for either and turbotax when e-filing requires various information from the actual taxpayer and not a POA who may be filing the return.  Is e-filing an option if signing in the capacity of a POA?

 

Please advise.  Thank you.