Confusion regarding hsn or sac code

ram MOHAN (STUDENT) (50 Points)

20 July 2017  

dear every one,

what we have to mention in bill for  goods transporter agency SAC OR HSN CODE,,

because governemnt providing both hsn and sac for goods transportation agency hsn as 8704 and sac as 91001,,

and im not sure to what to print on my invoice,,

 

can any pls help..