Will you please tell me from where I can know whether my NDA form accepted or not???

Here I am process to check the status of your NDA Application from where you can know that your form accepted or not

Go to the official site of Union Public Service Commission (UPSC)
At the right vertical bar of home page click on – UPSC Online Applications
Now new page will open and at this page, click on “ONLINE APPLICATION FOR VARIOUS EXAMINATIONS OF UPSC”
New page will open
At the end of top bar of this page click on - View / Print Application
Now new section will open which look likes below image



Under this section, enter your detail at provided place
Click on – Submit Button
You will get detail about your application form status