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Lk Personal Tax Skill — Development skill for Claude Code

Development community

Sri Lanka personal income tax skill for Claude & ChatGPT, answers tax questions in Sinhala and English, calculates annual tax and APIT step by step, and covers deadlines, filing (TIN/RAMIS), WHT/AIT a.

How to install Lk Personal Tax Skill

This entry records only its repository, not the path inside it, so there is no exact command to give. Open entwoh/lk-personal-tax-skill and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Lk Personal Tax Skill does

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README

lk-personal-tax

Sri Lanka personal income tax assistant as an agent skill (Claude) and a Custom GPT (ChatGPT). Rules snapshot: **October 2026**.

For everyone (no technical knowledge needed)

What can it do?

Ask it about Sri Lankan personal income tax in **Sinhala, English or Singlish**, for example:

"My salary is Rs. 350,000 a month. How much APIT is deducted?"
"Do I need to file a tax return for 2025/26?"
"I get paid in USD by foreign clients. How is that taxed?"
"When are my quarterly instalments due?"
"tax file එක දාන්නේ කොහොමද?" (how do I file on RAMIS?)

It can tell you:

whether you must pay or file a return
how much tax you owe, with the working shown step by step
how much tax is taken from your salary each month (APIT)
the due dates for instalments, final payment and the return
tax on interest, rent, service fees, dividends, and on selling land or shares
which documents to collect, and how to register for a TIN, file on RAMIS and pay

What it will NOT do

It does not log in to RAMIS or file or pay for you. It explains the steps and you do them.
It never needs your NIC, TIN, bank details or passwords. Don't share them.
It is not a licensed tax advisor. For complicated cases (partnerships, mid-year change of residency, gratuity, foreign tax credits), it points you to the IRD or a registered tax advisor.
The rules are as at October 2026. Sri Lankan tax law changes often, usually in the November Budget, so confirm important figures at ird.gov.lk.

How to start using it

Pick the one that matches the app you already use:

**A. ChatGPT (easiest to share with family and friends)**

Open ChatGPT, then Explore GPTs → Create (a paid plan is needed to create a GPT).
Open chatgpt/custom-gpt-instructions.md and copy the text under "Instructions" into the Instructions box.
Upload the files from the references/ folder and scripts/lk_tax_calc.py as Knowledge. Turn on Web Search and Code Interpreter.
Save