Gst tax invoice

Dear Sir,

We are working with Client Mahangar Gas Ltd with 3-4 Work order, Previously We were giving Serial NO from 1 to so on for Each work order. Now Cleint is Asking to put Serial on Same Contionue where it was end on 30.06.2017

Further we like to inform you that we are now putting bill no: Work order NO/08, Eg: 4100006017/06, Dated 13.09.2017 for next  work order Bill No 4100005317/12 dated 03/09/2017 so on

please let us known