You need to attest ur marriage crtificate, Education certificate and incase u have child then ur child birth certificate for ministry of foriegn affair, HRD, Qatar embassy Delhi and notary after u need to stamp those document in MOFA Doha, and if u want to apply for visit visa then you have to approch MOI madinat khalifa or permanent visa you have to approch Labour office (till now bec after some time its also going to change in MOI) Near to american hospital on C ring road.