e9006^Verification failed during extracting details from signed data - Credentials are invalid

Reason

This error happens if

1. If you haven't completed your dsc registration or dsc renewal

2. If there is a mismatch in the detail you entered in the authorization signatory

3. If you are signing with wrong signature  not the one you have registered in the site

Among these 3 reasons 1 and 2 are most likely cause for this error

Solution 

The best way to solve this problem is start from the beginning 

Step 1. Login on to your keralataxes home page 

Step 2. Select authorization signatory inside digital signature  

       If there is an entry delete it 

Step 3. Fill out the form 

3.1  PAN no must be the one which you provided on applying for dsc

3.2  Enter the name in first name column

       Name should be like the name in DSC , and leave the middle name and last name column  blank

3.3  Enter the email and mobile number

3.4  Enter the validity date 

3.5  Save record 
 
for more details
Filling authoritation signatory online form 

Click Back to home

Step 4. Now select digital signature enrollment inside digital signature

Press click here to enroll..

A websigner box shows up with your signature select your signature and sign ( enter the pin).

A success message appears.

 

If an error message appears saying this signature has already register 

No worries go back to home page , and continue the steps

Step 5. Now select digital signature renewal inside digital signature

Press click here to enroll

  A websigner box shows up with your signature select your signature and sign ( enter the pin)

  if websigner does not show up read the below article for fixing this error
  websigner does not show up

  If websigner shows up but no certificate in it then read this article for dealing with this error 
  Empty websigner or no certificate in websigner

If a success message appears then  you can proceed  , problem solved