Update tax details according to the below options.
Option 1: Have GST number– Update Provisional GSTIN and PAN no. and click on the ‘Next’ button
Option 2: Sell in GST Exempted Category– Enter PAN no. and click on the ‘Next’ button
Option 3: Don't have GST handy and will update later– click on the ‘Next’ button
Option 4: Have never registered for GST– If you have not registered for GST, please learn how to register for GST. Importantly, you don’t need a GST number to sell books on Amazon