Practice: Self-Declaring Taxes on HTKK Software

You will learn

• ✅ How to download and install HTKK software
• ✅ Logging in and setting up business information
• ✅ Completing VAT and PIT return forms
• ✅ Digitally signing and submitting returns online

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1. Introduction to HTKK

What is HTKK?

HTKK (Tax Declaration Support) is a free software provided by the General Department of Taxation, used for:

• Completing tax return forms
• Exporting XML files for online submission
• Checking data before submission

Two Ways to Declare Taxes

Method	Tool	Advantages	Disadvantages
Offline	HTKK Software	User-friendly interface, quick operations	Requires installation, frequent updates
Online	Website thuedientu.gdt.gov.vn	No installation required	Dependent on internet speed, less user-friendly interface

Recommendation: Use HTKK for beginners as the interface is more intuitive.

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2. Preparation Before Installation

System Requirements

• Operating System: Windows 7 or higher
• Storage: Approximately 200MB
• Internet Connection (for downloading and submitting tax forms)

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3. Download and Install HTKK

Step 1: Access the General Department of Taxation Website

1. Open your browser and go to: www.gdt.gov.vn
2. Scroll down, find the "HTKK" banner, and click on it
3. Or access directly: https://www.gdt.gov.vn/wps/portal/home/hotrokekhai

Step 2: Download the Software

1. Find the latest version (at the top)
2. Click on the .zip file to download
3. Save it to your Downloads folder or Desktop

Step 3: Extract and Install

1. Right-click on the .zip file → Select "Extract All" or "Giải nén"
2. Open the extracted folder
3. Find the setup.exe file and double-click to run it
4. Select "Continue" through the installation steps
5. You can keep the default installation path or change it
6. Click "Install" and wait for it to complete
7. Click "Finish"

Step 4: Launch HTKK

1. Go to your Desktop, find the HTKK icon
2. Right-click → Select "Open" (or "Run as Administrator" if you encounter errors)
3. If there's a security warning, select "Yes" or "Đồng ý"

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4. Login and Setup Information

First-time Login

1. At the login screen, the Tax Identification Number field will be empty
2. Enter the tax identification number of the business household
3. Click "OK"

Setting Up Business Household Information

The first time, you need to enter complete information:

Field	Description	Required?
Business Household Name	As per the registration license	✅ Yes
Address	Business location	✅ Yes
District/Ward	Select from the list	✅ Yes
Phone Number	Contact number	Recommended
Email	Contact email	Recommended
Business Activity	Primary business activity	✅ Yes

Note:

• This information will be saved, so you won't need to re-enter it next time.
• Declare according to the Business Household Registration License.

Subsequent Logins

• The tax identification number will be displayed in the list
• Simply select it and click "OK"

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5. Completing Tax Returns for Business Households

HTKK Main Interface

After logging in, you will see a left-hand menu with tax form categories:

• VAT
• PIT
• Business License Tax
• ...

Tax Forms for Business Households

You need to select the section:

• Lump-sum Tax and Rental Income Tax

Step 1: Select Tax Form

1. Go to the "Lump-sum Tax and Rental Income Tax" menu or search within the categories
2. Select "01/CNKD Individual Business Return (TT40/2021)"

Step 2: Select Tax Period

Field	How to Select
Tax Period	Select "Quarterly" or "Monthly"
Year	Select the corresponding year
Quarter/Month	Select the quarter or month to declare
First Filing/Amended	Select "First Filing" if declaring for the first time in the period

Step 3: Enter Data

General Information Section

• Business household name, tax identification number, address (usually pre-filled), and other required information
• Review for accuracy

Revenue and Tax Declaration Section

Item	Description	How to Enter
Revenue Generated in the Period	Total revenue from sales/services	Enter the amount
VAT Rate	Depends on business activity (1%, 2%, 3%, 5%)	Select from the list
PIT Rate	Depends on business activity (0.5%, 1%, 1.5%, 2%, 5%)	Select from the list

The system will automatically calculate:

• VAT Payable = Revenue × VAT Rate
• PIT Payable = Revenue × PIT Rate

Step 4: Check and Save

1. Click "Save" for the system to check for errors
2. If there are errors → Correct them according to the instructions → Click "Save" to save the return
3. If there are no errors → Click "Save" to save the return

Step 5: Export XML File

1. Click "Export XML"
2. Select the folder to save the file
3. Name the file (or keep the default name)
4. Click "Save"

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6. Digitally Sign and Submit Tax Returns

Method 1: Submit via Software from Digital Signature Provider

Each digital signature provider (VNPT-CA, Viettel-CA, FPT-CA, etc.) has its own software to:

1. Import the XML file from HTKK
2. Digitally sign
3. Submit to the electronic tax portal

Refer to the instructions from your digital signature provider.

Method 2: Submit via thuedientu.gdt.gov.vn

1. Access thuedientu.gdt.gov.vn
2. Log in using your electronic tax transaction account
3. Go to the "Submit Tax Return" menu
4. Select "Import XML File"
5. Upload the XML file exported from HTKK
6. Review the information
7. Digitally sign using your USB Token
8. Click "Submit Tax Return"
9. Receive the electronic receipt from the system

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7. Other Operations in HTKK

View Previously Filed Returns

1. Go to the "Search" or "Manage Returns" menu
2. Select the type of tax form and tax period
3. Click "Open" to view

Print Tax Returns

1. Open the tax return you want to print
2. Click "Print" or "Print Preview"
3. Select your printer and print

File Amended Returns

If you discover errors after submission:

1. Re-select the type of tax form and tax period
2. Select "Amended" instead of "First Filing"
3. Re-enter the correct data
4. Export and submit as usual

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8. Common Errors and Solutions

Error	Cause	Solution
Cannot open HTKK	Missing Administrator rights	Right-click → Run as Administrator
Tax Identification Number does not exist	Incorrect TIN entered	Check the TIN on your registration certificate
XML export error	Tax return not saved yet	Click "Save" before exporting
Tax return submission rejected	Corrupted XML file or expired digital signature	Check the file, renew the digital signature
Outdated software	Latest version not updated	Download and install the latest version

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9. Tips for Effective HTKK Use

💡 Always update to the latest version

The General Department of Taxation frequently updates HTKK when form layouts change. Check and update regularly.

💡 Back up your data

HTKK stores tax return data on your computer. It's advisable to back up the HTKK installation folder periodically to prevent data loss.

💡 Double-check before submitting

• Verify the tax period is correct
• Check revenue figures
• Check applicable tax rates

💡 Save the electronic receipt

After successful submission, save the electronic receipt as proof of timely submission.

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10. Online Declaration (Alternative to HTKK)

If you prefer not to install software, you can declare directly on the web:

Step 1: Access the Electronic Tax Portal

Go to thuedientu.gdt.gov.vn

Step 2: Log In

• Use your electronic tax transaction account
• Or log in with your digital signature

Step 3: Select Declaration Menu

• Go to "Online Declaration" or "Individual Business"
• Select the type of tax form and tax period

Step 4: Enter Data

• Enter data directly on the web
• The fields are similar to those in HTKK

Step 5: Sign and Submit

• Sign directly on the web
• Receive confirmation immediately after submission

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Checklist: Successful Tax Declaration

Preparation

• Installed the latest version of HTKK
• Have a valid digital signature
• Have an electronic tax transaction account
• Summarized revenue for the period

Execution

• Logged into HTKK with the tax ID number
• Selected the correct tax form and period
• Entered correct revenue and tax rates
• Clicked "Check" to detect errors
• Clicked "Save" to save the return
• Exported the XML file

Submitting the Return

• Logged into the electronic tax portal
• Imported the XML file
• Digitally signed
• Submitted the tax return
• Saved the electronic receipt

After Submission

• Paid taxes (if any)
• Saved records (tax returns, receipts)

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⚠️ Common Mistakes

1. Selecting the wrong tax period → For example, declaring for Q1 but mistakenly choosing Q2.

2. Forgetting to "Save" before exporting → The XML file will be empty.

3. Using an outdated HTKK version → May result in rejection during submission.

4. Not saving the receipt → Difficult to prove submission in case of disputes.

5. Submitting the tax return but forgetting to pay the tax → Incurring late payment penalties.

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Summary: Tax Guide for Sellers

Congratulations on completing 7 lessons in the Tax Guide for Sellers series! 🎉

Summary of what you've learned:

1. Starting a Business - Business registration vs. tax registration
2. Revenue Thresholds - When to pay taxes, how to calculate taxes
3. Tax Declaration - Forms, deadlines, how to submit
4. Electronic Invoices - When needed, handling errors
5. Deductible Expenses - 7 types of expenses and how to record them
6. Hiring Employees - PIT responsibilities
7. HTKK Practice - Installation and usage

Final Advice

• ✅ Keep all invoices and supporting documents
• ✅ Declare and pay taxes on time
• ✅ Separate personal and business finances
• ✅ Stay updated on policy changes from the tax authorities
• ✅ Contact your local Tax Department if you have questions

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Need More Support?

• General Department of Taxation Hotline: 1900 6199
• Website: www.gdt.gov.vn
• Electronic Tax Portal: thuedientu.gdt.gov.vn

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