You can watch HSN code with Item name on Sales or Purchase Entry Screen that is inserted by you at the time of item creation. For doing this For More info watch this video
Found Working Code on http://tallyexperttips.blogspot.in/2017/09/view-hsn-code-of-stock-item-during.html
Dear, If u have tally ERP 6.1 then why Tdl for HSN. It is default in tally. Just give for not Included in tally. pl