yes you can avail itc of igst against first for your igst payable and thereafter only for cgst payable. and supplier have to show this supply as inter state supply
No my question is 'A' is a registered dealer in Karnataka and when 'A' himself goes and buy the goods in tamilnadu. the supplier of tamilnadu will collect CGST and SGST from 'A' . But my question does ITC is available to 'A'