بسم الله الرحمن الرحيم
(Fatwa: 819/B-160/TB=1434)
It is not clear from the question whether you have given her three or two talaqs. If you have given three talaqs then it is necessary to do Shariah halalah in order to take your wife back. And if you have given two talaqs and the iddah is over then you may keep her after doing new nikah. You should have asked this ruling in Bangladesh to any Mufti instead of sending so far off place.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
