GSTR 3B Inputs conflicts. - Goods and Services Tax - GST

Hi, Can anyone help with how to set off inputs while filing GSTR-3B? In the month of March, I have sold goods to Tamil Nadu (I am from Karnataka, URP) worth Rs. 24,00,000 multiple bills and different customers. But now in the month of May, they have rejected the material, and I want to take it back. The rejected material is worth Rs. 10,00,000 by different customers, but it is B2CL. I have issued a credit note for the same and received the material. In the month of May, I have sold goods worth Rs. 23,00,000 (excluding the credit note), but this Rs. 23,00,000 sale is within the state of Karnataka. Now I can go and declare sales in GSTR-1 it will take a negative value but what should I do in GSTR-3B because at present I will not make any interstate supply? How can I get IGST input tax back? Should I need to minus it in CGST and SGST while filing GSTR-3B for the month of May?