Hello,

It was a must about 3-4 years ago , but after that it was optional.
Domicile certificate will be useful for you when you lack some documents like birth certificate or nationality which is nowadays not a compulsory document.
It can be useful for you in passport making through.
A very simple document which was in demand and looted Indian students , but then got optional.
Just keep in mind have these before you enter engineering ,
1. Birth certificate
2. Driving licence
3. Adhar card
4. Passport
5. Pan card
6. Class 10 and class 12 leaving certificates.
7. Class 10 and class 12 mark sheets.
8. Domicile (optional)
9. Any entrance exam mark sheet which you gave .
10. Caste certificate (if reservation applies )



Thank you