How to save tax to avail rebate ,u/s 87A?

V R PREMCHANDRAN (Others) (91 Points)

06 February 2024  
I'm a Sr. Citizen, having a Taxable income of 593000, after exhausting STD. DEDUCTION, 80C, 80D, 80TTB. I'm not eligible for any other deduction, like 80E, 80G etc..
How much more can I save to bring down the Taxable income below 5L, in order to avail rebate u/s 87A, to save tax?