There three jurisdiction, where you may get your marriage registered at the registrar's office:
1. Assam ( where marriage was solemnized)
2.Dehradun( where you are residing)
3.where either spouse stayed for at least six months before marriage
Both partners need to fill the relevant application form, sign it, and submit it, along with photocopies of the necessary documents , such as age proof and address proof, invitation card ,photograph of marriage . In addition to this both parties will need to disclose their previous marital status, if any. All the documents should be attested by a gazetted officer.