Hello Mr. Patil,
You might have heard that income received from Agricultural business is exempt but technically its not. Some part of your agricultural income gets taxed if you have any source of income other than Agricultural Income.
Other than PAn, TAN you may also need a Fire Licence, Food License, Insurance for your Cattle, PT numbers for the Directors to start with.
Trust this clarifies your query.
Feel free to get back/ call back in case of further details.
Rohit R Sharma
BCOM, ACA, LLB - GEN, CERT. FAFP