1. Login with username & p/w on homepage & you will be directed to http://www.topcafirms.com/index.php/launch

2. Sub-Menu will be displayed in green color which contains "Edit Profile" on mouse over, list will be opened and click on "CA Firm"

3.You will be directed to Edit Profile i.e. http://www.topcafirms.com/index.php/launch/leditinfo

4. Update the details

5. Click on "Save" button

If you don't know your username / password !!!

Follow below steps -

http://www.topcafirms.com/index.php/how-it-works/4775-how-to-access-my-account-if-i-forgot-my-username--password