If you don't wish to continue using Quicko, you can deactivate your account. However since Quicko is a registered ERI and as per regulations Quicko is supposed to store customer data for seven years.  

To deactivate taxpayer

  • Login to Quicko

  • Click on your Profile

  • Click on Deactivate Tax Payer

  • Type CONFIRM 

  • Click on Submit

Once you click on Submit, you will lose data of your e-filed ITR on Quicko. You can only access it through your account on Income Tax website.