Is it possible to redirect to my own domain or subdomain ????

Welcome and thanks for visiting the Community, @ksd-sudheesh-gma.

QuickBooks Online is saved in Intuit domains and servers. Hence, we're unable to change and redirect it to your domain or subdomain. 

For your future reference, utilize our available resources in the QuickBooks Article hub. You'll find help topics such as managing your account, customers' income, and expenses. 

Feel free to message again if you have other concerns. We're always delighted to help you some more.