Gst Invoice

Deep (student) (21 Points)

02 July 2017  
Dear Sir, I worked in a propritorship firm, and the full responsibility of the accounts department upon me, the problem is we( our company ) give service( technical support) to a company based in mumbai. So my question is when i will raise a invoice with gst in the preferred format (which has been recognised by goverment), what will i write in the descripttion format, should there mention hsn code or accounting code or something ?? in our previous invoices we used to wrote "batch module"... ????

and the second qeustion is after we sent the invoice to the party by email, wheather we have to upload our invoice to the gst site ? if any, please tell.... i am very tensed about those

i went through a lotof sites, but could'nt get the answer. Please help me


note : turnover of our company is 20 - 27 lakh rupees ( approx )