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TT99 Kế Toán

Look up TT99 accounting accounts right in your browser

Reading a circular, report or business document? Open TT99 Kế Toán on that page and hover over an account code to instantly see its name, status compared with TT200 and the accounting principle according to Circular 99/2025/TT-BTC.

Add to Chrome — freeSee how to use
  • 5 new accounts, 6 renamed, 7 removed compared with TT200
  • 50 sample journal entries
  • Offline, no login required

How to use?

No need to open another document, no need to remember which accounts changed under the new circular.

  1. On the page you’re reading, click the TT99 icon (or press Alt+Shift+T) once. The extension detects 3–4 digit account codes on the page and underlines them with a dashed line; hovering shows the account name, TT99 status and the accounting principle.

    • Works on circulars, financial statements, business documents
    • Click to open full details

  2. Open the lookup table to search by account number or name, filter new, renamed, removed accounts, and view the TT200 → TT99 comparison table.

    • Details of Principle, Debit side, Credit side, Balance
    • Search journal entries by transaction and check a Debit/Credit pair

  3. Practice TT99 accounts with flashcards, pin frequently used accounts and add personal notes — all saved directly in your browser.

    • Pin frequently used accounts, review lookup history
    • No account needed, no data sent anywhere

See it in action

What’s inside the extension

Lookup

Info box on hover
Name, TT99 status and accounting principle of the account code directly on the page.
Account details
Principle, Debit side, Credit side, Balance according to Circular 99/2025/TT-BTC.
Compare TT200 → TT99
Quickly filter new, renamed, removed and unchanged accounts.

Transactions and learning

Search journal entries
50 sample transactions, searchable by transaction name.
Check Debit/Credit pair
Enter two accounts to see if the entry pair is valid.
Flashcards, pin and notes
Memorize accounts, pin frequently used accounts, add personal notes — saved in the browser.

Who is it for?

From 01/01/2026, businesses keep their books under Circular 99/2025/TT-BTC instead of Circular 200.

  • Corporate accountantsSwitch the chart of accounts from TT200 to TT99 without scanning each circular page.
  • Auditors & consultantsRead reports, contracts, minutes and instantly understand the referenced account code.
  • Accounting studentsLearn the new chart of accounts with flashcards and journal entry examples.
  • Small business ownersUnderstand submitted accounting books without memorizing the chart of accounts.

Get started in a minute

  1. Add to Chrome

    Open the Chrome Web Store page and click Add to Chrome.

  2. Pin the icon

    Click the puzzle-piece icon on the toolbar and pin TT99 Kế Toán.

  3. Look it up

    On the page you’re reading, click the TT99 icon or press Alt+Shift+T, then hover over an account code.

Frequently asked questions

Can't find the answer you need? Contact us.

Is there any cost?
No. TT99 Kế Toán is free, unlimited and ad‑free. If you find it useful, you can support the author via the Support button in the extension.
Where does the account data come from?
From the official chart of accounts released with Circular 99/2025/TT-BTC (official Excel file), cross‑referenced with Circular 200/2014/TT-BTC. The extension is only a lookup tool; for actual accounting, refer to the original documents.
Is internet or login required?
No. All data is built into the extension, so it works offline and does not require an account.
Does the extension read my web page content?
The extension only reads the page when you activate it there, to detect account codes and show the info box; it does not send page content or lookup history anywhere.
Why isn’t my page underlined?
Underlining only activates on pages where you have opened the extension. Click the TT99 icon or press Alt+Shift+T on that page; reloading the page removes the underlining until you activate it again.

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Look up TT99 accounts with a single hover

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