I don't have the s/w to tab it for you. But here's the chord progression. The song is in DMaj and I believe it's in ChalanAtti raagam.
Panivizhum Malarvanam...oru varam
Iruvadhu nilavugal...thuLir vidum
KaigaL idaigaLil ....kaNgal moodum
F///D ( I sometimes add a DMaj7 in between).
On tape, this song is set to 1/2 step higher (D#maj) ...or maybe it's my tape