File Income Tax in which state

as income tax act it is mandatory for company (All Comapny) Or Individual, Firm (whose account audited)to fill Income tax retrun Online .

hence you file his Retrun Electonicaly.

if you Individual or firm (otherwise above mention) you can file your ITR at current state

is there an reference link which I can have a look?

Thanks

Abhay

Can I file the return in the first state?

-Abhay

you have to file return 

1) in case of manual return, at the address and state where your pan card is registered

2) e file from any state or place

but

you have to initiate the change of address immediately by rectify PAN application, as you have mentioned that you have changed the place of working, so all communication would be routed to your previous address only, to avoid this you have to update your address by filing pan rectification.

If I will be working in this location for some years only and later plan to go back to my earlier state. In this case can I continue filing the returns on my orignal state when I am working in other state for some years?

Thanks

Abhay

in that case, if your tax is deducted, then keep track of TDS under form 26AS, as in absence of display in 26 AS, your ITO would face trouble to allow you TDS not deducted at same zone CIT