I introduce here to Learn Tally TDL From Scratch – Step-by-Step Tally TDL Course. Tally is one of the most popular and powerful accounting software used by businesses worldwide. However, the true strength of Tally lies in its ability to be customized and extended using Tally Definition Language (TDL). TDL allows you to create custom reports, automate data processing, design vouchers, and modify the Tally interface to suit your business needs.
If you’ve ever wished to modify Tally reports or automate business processes directly in Tally, learning TDL Programming is the key! This blog introduces you to our Complete Tally TDL Course – a step-by-step program designed to take you from a beginner to an expert in TDL.

What is Tally TDL?
Tally Definition Language (TDL) is the proprietary language used to customize and extend the functionality of Tally. With TDL, you can:
- Create custom reports (e.g., Trial Balance, Ledger Report, Stock Summary)
- Add new fields and buttons in the Tally interface
- Automate data entry and processing
- Modify voucher formats
- Create customized dashboards and reports
- Integrate Tally with other systems (e.g., Excel, SQL databases)
TDL is easy to learn and powerful enough to handle complex business scenarios. By learning TDL, you can adapt Tally to your business requirements and increase efficiency.
Why Tally TDL Course?
Many businesses rely on Tally for accounting and financial management. However, the default features of Tally may not always align with the unique needs of every business. That’s where TDL comes in:
✔️ Customization: Modify reports, vouchers, and ledgers to match your business requirements.
✔️ Automation: Reduce manual work by automating data entry and processing.
✔️ Enhanced Reporting: Create detailed financial and inventory reports.
✔️ Integration: Integrate Tally with external systems like Excel, SQL, and other platforms.
✔️ Business Efficiency: Improve accuracy and save time with automated processes.
What You’ll Learn in This Course
Our Complete Tally TDL Course is designed to take you step-by-step from the basics to advanced TDL coding. The course is structured over 13 detailed chapters with real-world examples, practical exercises, and coding projects.
Key Topics Covered:
✅ 1. Introduction to TDL Programming
- What is TDL?
- Setting up the TDL development environment
- Creating your first TDL file
- How to load and test TDL files in Tally
✅ 2. TDL Syntax and Structure
- TDL file structure
- Keywords and syntax rules
- Using
[#Form]
,[#Report]
,[#Field]
- Commenting and debugging TDL code
✅ 3. Working with Variables, Functions & User Inputs
- Defining variables in TDL
- Creating and using functions
- Capturing user input
- Conditional statements in TDL
✅ 4. Report Customization
- Creating new reports
- Customizing existing reports
- Adding fields and filters
- Handling hierarchical data in reports
✅ 5. Collections – The Core of TDL
- What are Collections in TDL?
- Creating Master Collections and Voucher Collections
- Using
Fetch
,Filter
,Compute
, andAggr Compute
- Creating recursive collections for dynamic reports
✅ 6. Advanced Collection Handling
- Dynamic and Source Collections
- Walk through parent-child data
- Combining multiple data sources
- Handling complex report structures
✅ 7. Customizing Vouchers and Masters
- Modifying Sales, Purchase, and Payment Vouchers
- Adding new fields to Masters and Vouchers
- Handling voucher numbering
- Creating automatic posting vouchers
✅ 8. Form Customization
- Designing new Forms
- Adding buttons and fields
- Handling form submission events
- Designing multi-tab forms
✅ 9. Data Handling and Processing
- Reading and Writing data using Collections
- Handling date, time, and numeric fields
- Using aggregations in reports
- Handling complex calculations
✅ 10. Integration with External Systems
- Importing and exporting data to Excel
- Connecting to SQL databases
- Using ODBC connections
- HTTP POST and API integration
✅ 11. GST and Tax Automation
- Creating GST reports
- Automating tax calculation
- Customizing invoice formats
- Handling tax adjustments
✅ 12. Error Handling and Debugging
- Common TDL errors
- Using logs and debug windows
- Handling unexpected data values
✅ 13. Final Project – Create a Complete Business Dashboard
- Create a Trial Balance, Profit & Loss, and Balance Sheet
- Create a customized Stock Summary Report
- Build a multi-company data report
- Automate financial calculations
Who is This Tally TDL Course For?
This course is designed for:
- Business Owners – Customize Tally to suit business needs.
- Accountants – Generate custom financial reports.
- Tally Users – Automate repetitive tasks in Tally.
- Software Developers – Integrate Tally with other platforms.
- Tally Consultants – Offer customization services to clients.
What You Need Before Starting
- Basic understanding of Tally operations.
- Tally Prime installed on your system.
- Basic knowledge of accounting concepts.
- Willingness to learn coding (no prior programming knowledge required).
Why This TDL Course is the Best Choice
👉 Complete and Structured: The course is structured to take you from beginner to expert.
👉 Hands-On Learning: Every lesson includes practical exercises and projects.
👉 Real-World Examples: Learn how to create actual business reports and automations.
👉 Expert Guidance: Created by a Tally and TDL expert with years of industry experience.
👉 Lifetime Access: Get access to the course and updates forever.
How to Get Started
- Enroll in the course from Courses.Learnwells.com
- Download the Tally TDL Book and Tally Prime Developer Provided in the Course.
- Start learning step-by-step from Lesson 1.
- Practice the exercises and projects provided.
- Complete the final project to become a certified TDL expert.
Ready to Master Tally TDL?
If you’re ready to unlock the full potential of Tally and become a TDL expert, this course is the perfect solution! Join today and start creating custom reports, automating financial processes, and enhancing Tally’s performance like a pro!
👉 ENROLL NOW and start your TDL journey today!
FAQ:
What is Tally TDL?
Tally TDL (Tally Definition Language) is the proprietary programming language of Tally. It allows users to customize and extend the functionality of Tally. Using TDL, you can create custom reports, modify voucher formats, automate data entry, and integrate with external systems.
Who should learn Tally TDL course?
This course is ideal for:
- Business owners who want to customize Tally for their business needs.
- Accountants who want to automate data processing and reporting.
- Software developers who wish to integrate Tally with other platforms.
- Tally users who want to modify reports and vouchers.
- Tally consultants looking to offer advanced solutions to clients.
Do I need programming experience to learn Tally TDL?
No prior programming experience is required. The course starts from the basics and gradually moves to advanced concepts. Even if you’re new to coding, you can follow along with the step-by-step tutorials.
What are the benefits of learning Tally TDL Course?
By learning TDL, you will be able to:
✔️ Create customized reports and invoices.
✔️ Automate repetitive tasks in Tally.
✔️ Handle complex data using Collections.
✔️ Generate detailed financial reports.
✔️ Integrate Tally with external systems (like Excel, SQL).
What are TDL Collections and why are they important?
Collections in TDL are used to fetch, organize, and process data in Tally. They allow you to:
- Create dynamic reports.
- Handle hierarchical data (like parent-child relationships).
- Aggregate and compute data for financial summaries.
- Improve report performance by reducing data load time.
How long does it take to complete the Tally TDL course?
The course is designed to be completed in 2 to 4 weeks depending on your learning pace. It covers over 15 hours of content, including theory, coding examples, and practical exercises.
What are some real-world applications of TDL?
You can use TDL to:
✔️ Create customized financial reports.
✔️ Automate invoice and voucher creation.
✔️ Develop a real-time sales dashboard.
✔️ Modify stock summary and inventory reports.
✔️ Integrate Tally data with Excel and SQL databases.
Can I modify existing Tally reports using TDL?
Yes! TDL allows you to modify any existing report in Tally. You can add new fields, change the report format, and apply filters to customize the output.
What kind of support is available during the course?
You will have access to:
✔️ Step-by-step tutorials.
✔️ Coding examples and downloadable files.
✔️ Community forum for asking questions.
✔️ Whatsapp support from the instructor
Will the course cover GST and tax automation using TDL?
Yes! The course includes a dedicated section on GST and tax automation. You will learn to create GST reports, automate tax calculations, and modify invoice formats to comply with tax rules.
How is this course different from other Tally TDL courses?
This course is unique because:
✔️ It’s structured step-by-step from basics to advanced concepts.
✔️ It includes real-world projects and practical exercises.
✔️ It covers advanced topics like API integration, collections, and dashboard creation.
✔️ It provides detailed explanations and sample codes for easy understanding.
How will I practice the coding examples?
Each coding example comes with sample files and step-by-step instructions. You can test them directly in Tally Prime using the Developer Mode.
Can I access the course material after completion?
Yes, you will have lifetime access to all the course material, including future updates.
What software do I need to install to start the course?
You will need:
- Tally Prime (latest version)
- Tally Developer (for writing and testing TDL code)
- A text editor (like Notepad++ or Notepad)
How can I enroll in the course?
You can enroll directly from our website courses.learnwells.com. Once enrolled, you can access course material.
What payment methods are accepted for enrolling?
We accept major payment methods including:
✔️ Credit Card/Debit Card
✔️ UPI
✔️ PayPal/Razorpay/Instamojo
✔️ Net Banking
Will this course help me get a job as a TDL developer?
Yes! The skills you learn in this course are highly valuable for Tally customization and automation jobs. Many businesses are looking for TDL experts to improve their Tally performance and reporting.