One must obtain Import – Export Code registration for importing products and then selling them in different states after incorporation of any business entity.
To register under IEC, An online application can be made to DGFT department with basic details of business along with requisite documents. Further, only one IEC can be issued against a single PAN.
In addition to that as you will be selling goods after importing them in different states, GST registration is required as it is compulsory for anyone who does interstate supply of goods. For obtaining GST registration, an online application can be made with GST department with required documents based on type of business entity.