Which is the best import and export business in Tamil?

It depends your locality, network and experience. See what products around you are growing in agricultural and manufacturing commodities.

i. Coconut products,

ii.spices, herbal products,

iii. clothing and marine foods

These goods may be good for exporting from your place.

If you want to do import and export, I know a great site of export/import. You can surf the Internet to review TradeSNS. TradeSNS is one of the most trusted importers of export data providers in the world. It offers the most valuable business intelligence, convenient access, a pocket-friendly price to the popular searchable import-export trade database in the world.

Hope can help you!