Every indian business dreads waking up to a bill from the state. So too the Taj Mahal Palace. The Mumbai Port Trust, owner of the land upon which the landmark hotel sits, is demanding $92m in retrospective rent for the years 2012-22. The Taj, which is owned by Tata Group, a conglomerate, has called the demand “exorbitant and untenable” in a petition to the Bombay High Court. The claim’s size and the Taj’s prominence make the claim…