To register an Indian LLP, one must first acquire a Designated Partner Identification Number (DPIN) by filing an eForm. They must also obtain a digital signature certificate and register it on the portal. Once the LLP name is approved by the Ministry, the LLP can be registered by filing an incorporation form. All designated partners must obtain a DPIN by filing eForm DIR-3 along with required documents. The process involves reserving the LLP name, filing incorporation documents, partner consent forms, and the LLP agreement.