Digital signatures are a must for filing income tax returns online and thus one has to first of all apply to procure the same and should also take care to protect the digital signatures.

Have a look at the precautions which needs to be taken for protection of digital signatures:-

• The crux point is that the owner of the digital signature is legally responsible for digital signature created by the key.
• It is also advised to use a strong password to access the digital signature. You can also look at a video which shows how to have strong passwords which are tough to crack but easy to remember and it is really damn easy.
• Certifying authority should be immediately contacted if the digital signature key being lost or stolen. This will help in revoling the digital signature certificate.
• For details visit CCA(dot)Gov(dot)in