De-register digital signature on income tax portal

use the option file without DSC,

no need to remove as its already expired 

Reason to de-register the digital certificate is that it is not allowing to file form 15CA without digital signature.  This client is not an Audited Assessee and is NRI. So only for one transaction digital signature has to be procured. 

I have already seen this file before posting this query. But if you have already registered signature on the portal earlier, the option of attaching the dsc becomes mandatory.

for ITR its not mandatory, but for 15CA, it applies 

Sir

I am salaried person and  registered my Signature thru DSC during the year 2013-14, but now it has been expired, I know that there is no need to register DSC for filing my ITR.

while uploading 10E Income Tax site is seeking for DSC and iam unable to upload the file ?

kindly suggest me/let me know what steps to be taken to remove Digital Signature ?

Unfortunately if once the digital signature is registered in your account, it is not possible to deregister and so you will have to renew your signature and upload the form 10E with the digisign

Does renewing my signature mean that I will be able to change or make minor changes to  the digital signature?

i am a service man, i file my itr through other person and that person have my DSC. Now i have conflict with that persone. i want to deregister DSC from my income tax portal so that he may not miss use it.

suggest me better way..

Our DSC has been enabled by mistake in income tax portal. Then we are not able to login the income tax portal. When I am going to login the income tax portal DSC option is otomatic coming on the portal but dsc is not working.So what is the procedure to active again the dsc.