This is one of my most favourite songs. I've tabbed it myself and it sounds pretty good.
try it and do leave comments.

Cm (x3101x@1) Gm (355333@1)  Fm (133111@1)    GmShob (355333@1)alo nibhe jak adhare,
Cm (x3101x@1)   Gm (355333@1)       Fm (133111@1)    GmShudhu (355333@1)jege thak oi durer tarara...
Cm (x3101x@1)  Gm (355333@1)   Fm (133111@1)        GmShob (355333@1)shobdo theme jak nistobdhotay,
Cm (x3101x@1)   Gm (355333@1)      Fm (133111@1)      Gm (355333@1)     CmShudhu (x3101x@1)jege thak ei shagor amar pashe-
Gm (355333@1)   Fm (133111@1)   GmAhaha...ahahaa-haha... (355333@1)Cm (x3101x@1)   Gm (355333@1)      Fm (133111@1)   GmAha...ahahaha...ahahaa-hahaha. (355333@1)
Cm (x3101x@1) Gm (355333@1)    Fm (133111@1)     GmShob (355333@1)bedona muche jak sthirotay,
Cm (x3101x@1)  Gm (355333@1)     Fm (133111@1)     GmRidoy (355333@1)vore jak ostitter anonde...
Cm (x3101x@1)  Gm (355333@1)    Fm (133111@1) GmRidoy (355333@1)gobhire obak drishtite,
Cm (x3101x@1)    Gm (355333@1)    Fm (133111@1)     GmThomke (355333@1)dariyeche mohakal ekhane-
Gm (355333@1)   Fm (133111@1)   GmAhaha...ahahaa-haha... (355333@1)Cm (x3101x@1)   Gm (355333@1)      Fm (133111@1)   Gm (355333@1)  CAha...ahahaha...ahahaa-hahaha-ha. (x32010@1)
C (x32010@1)                FShukno (133211@1)balir shoikote,
G (320003@1)     F (133211@1)      G (320003@1)    FElomelo (133211@1)batashe, guitar haate,
G (320003@1)         FNistobdhota (133211@1)chouchir,
G (320003@1)   F (133211@1)          G# (xx1114@1)          GUnmad (320003@1)jhonkare kadi amar shukher kanna,
G# (xx1114@1)          GJeno (320003@1)chuni hira panna,
G# (xx1114@1)    Gm (355333@1)   Fm (133111@1)       GmShagorer (355333@1)buke, alpona eke diye jay
Cm (x3101x@1)      C (x32010@1)     Cm (x3101x@1)  Gm (355333@1)   CmObak (x3101x@1)bhalobashay...obak bhalobashay.

After this, there's a piano solo. And then the whole thing is repeated. The only change 
in the first two lines of the 2nd stanza. Here are the new lines:

Cm (x3101x@1) Gm (355333@1)   Fm (133111@1)     GmShob (355333@1)koshte boye jak shukher jhor,
Cm (x3101x@1)  Gm (355333@1)      Fm (133111@1)     GmRidoy (355333@1)vore jak shohojnil shopone...

And the rest is the same. That's all there's to it. Good luck!

You may also send your comments to my email address,
scorpion.caterpillar007@hotmail.com