Hi Anirudh,
You can assign PLD to specific business partners.
Go to Layout Manager Select PLD
Let Says PLD with 'TAX Invoice'
click on set as default button.
Choose set as default for Specified BP<< Select Customers to whom you are selling
under format of TAX Invoice. For Every New BP You have to assign the Default Sales PLD.
Do the same for 'Retail Invoice'
Hope this help.
Thanks,
Regards,
Sudhir