How to give proof to IT dept for long term capital gain invested in construction?

@ Ashim: Yes, correct. Time limit is there, means you can open the account before filling the IT return.

Secondly, for exemption u/s. 54F, net sale proceed is considered and not just capital gain.

Sir,

   Is there any consession if the long term  capital gain is made by senoir citizenship i.e above 60years.by selling of land.

Except the basic taxable limit of 3.00 lakhs, no special consession available to senior citizen against Long term capital gain.

As your assessee is having other tax exempted income, he can easily reduce tax liability over LTCG by basic limit of 3 lakhs.

Secondly, he can also get exemption u/s. 54EC; i.e. tax saving bonds.