Build POS - VB.NET WPF windows Application

I have SAAS ERP website and all API ready also i have online POS , need windows version same like online , this features i need in win version :

working with SAAS website
Multiple location for same account
Download date from Web account (prodcut , category , price ... etc (Syn with online website (maine ERP))
Touch screen compatible
Powerful searching facility ( Name , SKU , Scan Bar code)
view product by categories or brands
working Offline and can uploud invoices when connect internet
Opening and closeing Cash register
Register details
Hold Invoice , Guest customer information
sales return
KOT & BOT Generate
Dine In , Delivery , Take away , company delivaey
Fast Cash Facility
Discount , servcie charge , other charge
split bill option ( cash , card)
Chose client name or add new one
POS receipt print with QR and can add more printer depending on category
Add Expense
Tax
Multilanguage (English , Arabic RTL) and can add more like urdo