CTO
                
                   745 Points
                   Joined August 2015
                
               
			  
			  
             
            
             1] Ur brother received newPAN. 
2] Register at  https://incometaxindiaefiling.gov.in/
3] after registering the PAN with mobile no, email id and aadhar goto  view 26as
4] 26as statement shows various taxes deducted , refund received in the year , AIR Transaction  eg shares purchased above 1 lakh, credit card payments above 2 lakhs etc  , Short payments of TDs etc
5]  If every thing is blank in 26AS and ur brother does not have any income or income less than 2.5 lakhs - he did not file any IT return.
6] But if there are Tax credits  then he may have to file return to get refunds
7] if there are AIR transactions then ur brother may get notice if he does not file return.
I hope this is helpful