Info required on Tax saving

In this month payslip these were the data

Annual Income - 7,67,xxx Net Tax Income - 7,17,xxx (After deduction) Tot. Tax payable - 17,xxx Tax deducted this month - 1,xxx

Will this Total Tax payable is for this entire financial year or it will be increases frequently after each month salary?

If I increase my PF contribution of about 20k for this year will this works for saving tax?

Or any otherway is there means pls guide me

Thanks in advance 👍