Tds on salary

Dear All

Below are the salary details -

Monthly Salary         - 20 Lakhs

Quarterly Incentives -  5 Lakhs 

Annual Tax on Monthly Salary - 290000, Monthly Rs. 24000

Annual Tax on Quarterly Ince. - 72000, Quarterly Rs. 18000

Annual Tax on Total Salary -  362000, monthly Rs. 30000

For TDS, should I dedcut Rs. 24000 for April and May each and For June Rs. 42000 (24000+18000).

Or should I deduct TDS Rs. 30000 from April to March monthly?

Thanks & Regards

Abhijit