There are a few steps you need to follow. First, visit the official np domain registration website. Head to the User Signup page
Create your account and verify it. After that sign in to the register.com.np website. Check if the desired domain is available or not. If yes, then click on Register Now. Now enter the primary name server and secondary name server. Fill up the Administrative contact and Technical contact. Hit Save & Continue. Now upload the required documents. If you are registering for personal purposes then upload your citizenship scan and cover letter. If you are registering for business then upload PAN/VAT copy, cover letter, company registration documents. Finally, wait for the approval.