What we have to do If our IT return is Invalid

SUNDARRAJAN (Accounts Exevc) (30 Points)

09 May 2019  
Dear All,

One of my friend filed his IT return for the year 2017-18 during last September 18. But he has not verified his return through OTP/ sending post due to abroad travel. Now he is applying loan, while verifying his IT return it's shows as the return as Invalid.

Is there is any alternate available for verify return again.( As the due date 31st March already expired).

Pls advise

thanks in advance