Additional tax would be around 145704.
As TDS on interest is deducted at 10% and you are in 30% so you need to pay additional 20% tax on interest income.
Since you have already taken full deduction of PPF and HRA there are not much ways to save tax. Also generally if you want to save tax for any financial the due date for investment is 31.03 of that financial year, however due to covid situation this year the due date was extended to 30.06.2020.
There is only one option left to invest in NPS Rs. 50000 which can save 15000 tax. Also you havent claim mediclaim but it would be useful for next year.
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