8.However, the defendant-corporation in their written statement have categorically pleaded that even though originally property tax was fixed at Rs.162/- for every half year till 1993-94, since a Government department was functioning in the suit schedule building, based on the annual rent, the property tax was revised and enhanced to Rs.4,087/- with effect from 1993-94. The stand of the corporation is that this revision was based on the rent collected by the building owner from the fire services department. The further stand of the defendant is that post 1993-94, there has been no revision or enhancement of the property tax. In any event, the plaintiff was aware of the stand of the department atleast from the year 1998. Nothing stopped the plaintiff from questioning the determination of the property tax by the local body. The plaintiff could have moved the Tribunal. The plaintiff has not done so. If the plaintiff felt aggrieved that proper procedure was not followed in the matter of determination, the plaintiff could have very well filed a suit seeking a declaration that the determination of the property tax by the local body was illegal. The plaintiff did not seek any such relief. As rightly pointed out by the learned standing counsel for the respondent, so long as there is no challenge to the primary determination by the department, in a suit for refund, the validity of the primary demand cannot be gone into. The Hon'ble Supreme Court in the decision made in Civil Appeal No.2552 of 1989 (Collector of Central Excise, Kanpur Vs. Flock (India) Limited, C-7, Panki Industrial Area, Kanpur), dated 04.08.2020 had held as follows:-