Build the next era of business software on Tally.

Developer documentation, hands-on guides, and courses to help you build customizations and integrations with TallyPrime. Learn Tally Definition Language (TDL), extend workflows, create custom solutions, and integrate TallyPrime with external applications.

Build TDL-based customizations — modify reports, add custom screens, automate vouchers. Explore TallyPrime Developer, TDL courses, and step-by-step documentation.

Explore Customization →

TDL Hello World

helloworld.tdl

; Define a simple report
[Report : HelloWorld]
  Form : HelloWorld

; Define the form with a field
[Form : HelloWorld]
  Parts : HelloPart

[Part : HelloPart]
  Lines : HelloLine

[Line : HelloLine]
  Fields : HelloField

[Field : HelloField]
  Use : Name Field
  Set : "Hello, World!"

Tally Customers

API Endpoints

Sample Codes

TallyShop Add-ons

Skills & Courses

Courses, playbooks, and guided paths to take you from beginner to publishing your first solution

Courses

TDL Essential Course

Master TallyPrime's core development language. Covers syntax, functions, and building your first TDL module.

Start Course (India) ↗Start Course (International) ↗

Integration Course

Learn how to connect third-party applications with TallyPrime using XML, JSON, and ODBC.

Coming Soon

Skills

Developer Playbook

Strategic guide covering solution design, marketplace listing strategy, pricing, and growing on Tally.

Read Playbook ↗

Build with TallyPrime

Reference material organised by what you're building

Customization

Customization Ref

TDL technical references and customization docs

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Integration

Integration Guides

Step-by-step walkthroughs for connecting third-party apps

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Data Exchange Docs

XML, JSON, ODBC connectivity guides

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General

FAQs & Troubleshooting

Common developer questions and debug references

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Developer Tools & Sandbox

Everything you need to build, test, and ship

TallyPrime Developer

Official IDE for TDL-based solutions. Write, test, and deploy inside TallyPrime — includes Tally Connector, Dictionary Manager, and the Authentication Library.

Download Now ↗90 Days Free Evaluation Period ↗

API Explorer

Test Tally APIs live — simulate calls, inspect responses, and debug before shipping.

Open API Explorer ↗