gst query

If u prchase from other state , the supplier will charge u IGST, & u can take input for the same
if u purchase within the state ,supplier will charge u CGST/SGST, & u can take input for same.

Applicability of GST depends on place of supply, not on state. One such example is restaurants. They can charge on CGST and SGST. Even if you are from different state.
One of our client is also facing same issue where Supplier charges CGST and SGST. My client is in different state. So, he is not able take input credit as there is not GST registration of that state.