Confused About Professional Tax Deductions? Should It Be on Full or Partial Salary?

I have to deduct professional tax, so can you please tell me on which amount of salary we deduct Professional Tax? Suppose the monthly gross for 30 days is 3000 Rs, but the employee works for 25 days and the gross salary is 2500. On which amount do we have to deduct Professional Tax? On Rs 3000 or Rs 2500?

PT needs to be deducted on actual earnings only, i.e. $2500.00.

Thank you.