registration of gstn.

Yes. You want registration Under GST...

The goods are exempted. But, Your commision not exempted its GST applicable.

After registration you ll be pay tax under RCM basis for above said Rent paid if they are Unregistered...!

ok. sir but as per sec 23. . Persons not liable for registration.

[1] The following persons shall not be liable to registration, namely:--

[a] any person engaged exclusively in the business of supplying goods or services or both that are not liable to tax or wholly exempt from tax under this Act or under the Integrated Goods and Services Tax Act;.

this says ... my dealing product are totally exampt then why i have to register.. because of RCM.?

Hello...
Your dealing is Commission. Not above said Goods...

Above said law is exactly correct. But, you are not correct....

Explain your nature of work....!

nature of work is selling the agri product on behalf of farmers. commission is my income.(A P M C MERCHANT).

INTERESTING QUESTION. SHOULD BE MAILED TO GST HELPLINE. 

MY OPINION - YOU ARE ISSUING INVOICE TO FARMER FOR COMMISSION , NOT TO PURCHASER OF AGRI. PRODUCTS.

SO, THIS IS NOT YOUR SUPPLY OF EXEMPTED GOODS