Taxation on family pension

A senior female citizen draws family pension after death of her husband. Family pension has a basic component + DA

which amounts to a consolidated amount 23K per month. How is tax computed on this>

Should we pay tax on 276000/- or should we detuct HRA on this and pay tax. can you please let us know.

So which one we need to consider, Just basic or whatever is credited into the bank account as pension needs to be considered for tax computation purposes?

please explain.