Go to a Digital signature provider and ask him to make a new dsc. Delete the old one and download the new dsc file in the same device. Consult to your dsc provider once before downloading the dsc to your existing device, since it may need some up-gradation.
Aggarwal Sarawagi and Co
New Delhi
CA
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Vardhaman Group of India
Pimpri Chinchwad
CA Inter
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CAclubindia
