Regarding issue on contractual employee payment

Hello, I have seen some company are deducted 2% from the salary on the payment of contractual basis employees. Even some employees salary 27250 k and some 28250k. Telling whole thing here, In a year 365 day, Sangathan will not pay above said type of employees on summer vacation - 40 days, autumn brake - 10 days and winter vacation - 20 days. So total working days should be like this as simply calculation : 365 - (40+10+20) = 295 days only 27250 k based employee will get = 295 * (27250/31), 28250k based employee will get = 295 * (28250/31), 31250 k based employee will get = 295 * (31250/31). 27250k based employee annual income = 259314, 28250k based employee annual income =268830, 31250 k based employee annual income = 297379, All are just approx values, What should be criteria of deduction of income tax from above said employees. I listened 275000 is limit of deduction is 0rs income tax. And above this amount like 31250k based employees will ( [deleted])pay income tax on this amount only 22379. As i know. Please tell me is that correct 2% every month will deducted from above said employee's salary? Thanks