Window for investment in housing property to save capital gains tax

Towards Capital gains, I laid advance tax on 15th March 2018.

I think I did not make myself clear. Imagine I received Rs 1000 as proceeds for sale of shares in Jan 18. I showed Rs 100 as planned investment in housing and placed this amount in Capital gains FD in June 18. On balance 900, I paid advance tax on 15th March and of course filed my return by end July.

Now this Rs 100 which I set aside needs to be invested in property. Question is for this only

I wish department were as understanding and reasonable. My question is 'from.which date will the 2 year count down start, as per law'

as per law the count down starts after the date of transfer

Although the period of 2 years starts from the date of transfer but in your case you need to check what is the actual date of transfer of shares..Mere receipt of consideration for shares would not amount to transfer of shares. Transfer of shares is complete only when the share certificates are actually handed to the buyer.