You need to apply for entry visa, type x, while the existing tourist visas are suspended. By November 15, the restrictions are opening up. You might still have to apply for a fresh tourist visa or OCI card.
If you have a tourist visa, you cannot, for now. Only certain types of visas are allowed to go to India during COVID pandemic. Check Indian embassy website, they have a full list of which types of visas they have opened. My wife had to get an emergency Visa to go to India even though she has a valid 10 year tourist visa.
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