Yes. You can do that. Tamilnadu High court has recently given a ruling that the children of intercaste marriage couples can choose the community of any one of the two parents. You have not mentioned the community of your mother. Community certificate will be given to only eligible candidates with the following requirements.
Scheduled Caste, Scheduled Tribe or Other Backward Classes people only require a community certificate to claim reservations under these categories. If you want to adopt your mother's community and if her community is one of the above-mentioned communities, you can apply for the fresh community certificate. At the time of submission, you should complete your 3 years of age and you should be an Indian Citizen.
The following documents are required for applying for this certificate.
1. You have to fill the application for the Community Certificate
2. Parents' identity proof.
3. An affidavit stating the applicant's name, father's name, address, and community. This is required only in the case of a minor applying for the same.
4. An Address Proof
5. Ration Card
6. Proof for the age of the applicant
7. Caste Certificate of the parents
8. Aadhar Card
You can visit any of the nearest e Seva Centres and you can apply online for the same. You can apply offline also by going to the Mandal Revenue office in your area.
You have to carry all the above certificates in original and copies also so that you can attache as reuied.