How can taxpayer find his Assessing Officer (AO) Code?

Follow the below steps to know your AO code:

Step 1: On the landing page of the Income-tax portal select "Know Your AO" from the left-hand side menu: 

Step 2: Enter PAN and registered Mobile number and click on Continue:

Step 3: Enter OTP received on the registered mobile number and click on Validate:

Step 4: You will see the below screen showing details of your AO: