Key legal question
Whether the company's principal tax domicile was in Y.________ (NE) or elsewhere
Extracted holding
Y.________ was not the principal fiscal domicile; the site there was only a special tax domicile tied to the immovable.
Extracted reasoning
For a real-estate company, the principal domicile follows the place of effective administration, not merely the location of an important property. The record pointed to management and strategic decisions in another canton, while Y.________ hosted only property management.