Info on Tax Saving

I have very few knowledge on Tax. So sharing my queries here. Kindly guide me

In my Apr month salary slip I got to know about this.

Annual Income - 7,67,xxx Net Tax Income - 7,17,xxx (After deduction 50k) Tot. Tax payable - 17,xxx Tax deducted this month - 1,xxx (Tagged to NEW Tax Regime)

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 👍