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Software Requirements Specification (SRS) for GST Input Tax Credit Calculator

Introduction

Purpose:

The purpose of this document is to define the requirements for the development of a GST Input Tax Credit Calculator. This web-based application aims to assist businesses in calculating the eligible input tax credit under the Goods and Services Tax (GST) system.

Scope:

The GST Input Tax Credit Calculator will provide businesses with a user-friendly interface to input GST details and calculate the input tax credit. The application will adhere to GST regulations and guidelines.

System Overview

System Description:

The system will be a client-server application. Users will access the GST Input Tax Credit Calculator through a web browser. The server will handle the logic for input tax credit calculations.

System Architecture:

The application will follow a three-tier architecture: presentation layer (client-side browser), application layer (server-side processing), and data layer (storage and retrieval of data).

Functional Requirements

Use Cases:

Calculate Input Tax Credit:

  • Users can input GST details, including GST paid on purchases and GST received on sales.
  • The system will calculate and display the eligible input tax credit based on the provided information.

Functional Requirements:

Input:

The system shall allow users to enter the following details:

  • GST Amount Paid on Purchases (in INR)
  • GST Amount Received on Sales (in INR)

Calculation:

  • The system shall calculate the eligible input tax credit based on the provided GST amounts.

Output:

  • The system shall display the calculated input tax credit amount to the user.

External Interface Requirements

User Interfaces:

  • The user interface shall consist of input fields for GST amounts paid and received, along with a “Calculate” button.
  • The calculated input tax credit amount shall be displayed prominently.

Hardware Interfaces:

  • The system should be compatible with standard computing hardware.

Software Interfaces:

  • The application will be developed using HTML, CSS, and JavaScript for the frontend.
  • The backend can be implemented using a server-side framework (e.g., Node.js, Django) with a database for data storage.

Communication Interfaces:

  • The application will communicate with the server for input tax credit calculations.

Performance Requirements

Response Time:

The system should provide a response time of under 3 seconds for a typical user input.

Throughput:

The application should handle at least 50 simultaneous users.

System Constraints

 Regulatory Requirements:

The application should comply with relevant GST regulations and guidelines.

Hardware Limitations:

The system should be compatible with devices supporting standard web browsers.

Security Requirements

Authentication:

User authentication may be implemented to ensure data security.

Data Protection:

User data, if stored, should be securely protected.

Quality Attributes

Reliability:

The application should provide accurate input tax credit calculations based on the entered GST details.

Maintainability:

The code should be well-documented for ease of maintenance.

Usability:

The user interface should be intuitive, requiring minimal guidance.

Testing Requirements

Test Cases:

Test cases should cover various scenarios with different GST amounts to ensure accurate input tax credit calculations.

Test Case 1:

  • Inputs: GST Amount Paid on Purchases = 50,000 INR, GST Amount Received on Sales = 80,000 INR.
  • Expected Output: Input Tax Credit ≈ 50,000 INR

Test Case 2:

  • Inputs: GST Amount Paid on Purchases = 1,00,000 INR, GST Amount Received on Sales = 1,20,000 INR.
  • Expected Output: Input Tax Credit ≈ 1,00,000 INR

Test Case 3:

  • Inputs: GST Amount Paid on Purchases = 30,000 INR, GST Amount Received on Sales = 40,000 INR.
  • Expected Output: Input Tax Credit ≈ 30,000 INR

Acceptance Criteria:

The application is considered successful if it produces correct input tax credit amounts based on the provided GST input amounts.

Project Timeline

Milestones:

 Design, Development, Testing, Deployment.

Development Phases:

 Frontend development, Backend development, Testing, Deployment.

Glossary

None

Database Structure

Tables:

GST_Input_Tax_Credit_Records:

  • RecordID (Primary Key, Auto-increment)
  • GSTAmountPaidOnPurchases (Decimal)
  • GSTAmountReceivedOnSales (Decimal)
  • InputTaxCreditAmount (Decimal)
  • CalculationDate (DateTime)

Conclusion

This SRS document outlines the requirements for the GST Input Tax Credit Calculator. It serves as a guide for the development team and ensures that the application meets the specified criteria. Review and approval by relevant stakeholders are essential before proceeding with the development phase.

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