Do we have declare something in tax manager of we are opting new tax regime,how are we going to understand how much deduction will be there!

Interesting question! Here’s my answer to that. I could be wrong so please get it verified with others who responds. No, we don’t have to declare anything (not that I’m aware of) in Tax Manager for new tax regime as the standard deduction for new tax regime is already ₹75k plus we have more no. of tax slabs for efficiency of tax calculation.