Hsn code of office expenses

              I want to know that is it mandatory to show the “HSN CODE” of “office expenses product” in “GSTR-2” for taking “CREDIT INPUT”. My question is because most of time we make any purchase for office expenses e.g Printing & stationary, Tea, milk, sugar medicine etc. because unregister dealer doesn’t have it & it is also not compulsory to mention “HSN CODE” by the vendor whose turnover under 1.5 Crore & Composition Vendor. Then it is not possible to get the exact “HSN CODE”. Please make us clear ASAP.