Tally Module with SaaS Integration

I am in need of a Tally module that supports both a Mobile App and Web App for my sales team to create and sync quotations.

Key Features:
- The ability to sync orders automatically to Tally
- Generating and sending receipts after payment
- Real-time inventory management
- A comprehensive Voucher System for Quotation Receipts

This Tally module should have a simple user authentication system using Email and Password.

Ideal Skills and Experience:
- Proficiency in developing Tally modules with SaaS options
- Experience with creating Mobile and Web Apps
- Familiarity with real-time inventory management systems
- Skills in implementing secure and simple user authentication systems

Please note, I prefer a ready app/website that can be customized to meet these requirements.