Pro Bill Master: Retail Billing System Pro Bill Master is a desktop-based application designed to streamline daily sales and invoice management for small businesses and restaurants. Built using the Python programming language, it provides a simple yet effective solution for retail environments.

Project Purpose The primary goal of this project was to develop a system that could be operated without specialized technical knowledge. It is designed to save the user time and ensure high accuracy in financial calculations. By utilizing SQLite as the backend database, every transaction is permanently recorded for future reference.

Key Features Secure Login Panel: An administrative login interface is implemented to prevent unauthorized access to the billing system.

Dynamic Dashboard: Users can increase or decrease item quantities with a single click, and the grand total updates in real-time.

Sales History Tracking: A dedicated window or table view is provided to monitor all previous transaction records stored in the database.

Invoice Generation: Upon every successful sale, a text-based invoice is generated which can be printed or saved for documentation.

Technical Stack Programming Language: Python 3.11.

Graphical User Interface (GUI): Tkinter.

Database: SQLite3.

Development Tool: Visual Studio Code (VS Code).

Software Overview Login Screen: This is the initial entry point where admin credentials are required to access the system.

Billing Dashboard: The main interface displaying the food menu on the left and the grand total on the right.