Tds on perquisites

One possible solution may be the reverse calculation. Suppose you have a tds amount of Rs 5000, then taxable perquisite amount would be Rs. 50000. if tax deducted for whole year then add basic exemption amount to it and it would come rs 2,50,000/-.

let's say if the particular employee have any savings (eg 10000) then add such amount also to Rs 2.50 and it would be Rs. 2.60lac