Hi Harsha,
Open form No Series, and search for series set in Sales & Receive. Setup> Posted Invoice Nos… and you click on the button Series and select Relationnships . I will open a new form which adds shr001 for showroom, cr0001 for corporatre, re0001 for retail.
At this point you now a default series of Sales & Receive. Setup. Posted Invoice Nos. … , And now the user will choose another number for each location.
Do not forget to added to our front Sales Order or Invoice Posting No. Series field.
Regards
Florin