Respected seniors and friends,
Please read the process of uploading Digital Signature while Online Income Tax Return Filling with picture presentation here in attached file.
On below provided link please find the FOQ on digital signature use while filling online return.
https://incometaxindiaefiling.gov.in/portal/faq_signature.do
Source of attachment and FOQ is : www.incometax.govt.in
https://incometaxindiaefiling.gov.in/portal
Don't forget to share your comments.
Thanks & regards,
Abhi