For each PAN card there is one AO (Assessing Officer) code for area/ward/ circle associated with it. In the process of income tax return filing you need to provide AO (Assessing officer) code.
This code is used for sending your income tax return file to designated AO for the processing of your income tax return. If any problem or clarification is required for your income tax return or you need to get refund amount of income tax, you need to contact to only your designated AO (Assessing officer) .
If you are filing income tax return online, your income tax return will be processed by Income tax department- CPC, Bangalore only. If they find any problem in your income tax return, they will send your income tax return to your AO as assigned with your PAN for further processing on income tax return.
So, here is the quick way to find your AO (Assessing officer) code online.
1. Go to www.incometaxindiaefiling.gov.in (this is the same website where you can file income tax return online.)
2. If you are not registered user, get registered yourself with your PAN by giving correct information.
3 . after login, click the link to know your AO (link is given at left column after login). and note down the AO code.
4. keep your password for www.incometaxindiaefiling.gov.in remembered and safe, it is very useful website for all of your previous income tax return details.