Personal income tax finalisation — individuals doing it themselves

👤 Individuals

People with salary from two payers, who left their job before the company's finalisation, who have income from which no tax was withheld, or who want a refund finalise for themselves. The deadline is the last day of the 4th month after the calendar year; file on the tax app and check every line against the withholding certificates.

TaxDatum helps you prepare and does not file on your behalf. TaxDatum is run by a private company, not the tax authority; filing is done on the official channel named under Where to file.

0/7 steps done 0/8 documents ready 6 common mistakes 5 explainers (in Vietnamese)

Who needs to do this

People with salary or wages from two or more payers during the year who do not qualify to authorise an organisation to finalise for them.
People who left their job before the company's finalisation and are required to finalise or want a refund.
People with income from abroad or from a payer that did not withhold tax.
People with overpaid tax they want refunded, or with dependants not yet counted during the year.

When

After the calendar year ends, once all withholding certificates are available.
Deadline: the last day of the 4th month following the calendar year (under the Law on Tax Administration) — check updated guidance if there are changes.

Steps in order

1Determine whether you must self-finaliseCheck against the conditions for authorising an organisation and the cases exempt from finalisation under the documents currently in force. If unsure, draft a trial return on the app: the system will show whether you owe more or have overpaid.
2Ask every payer for a withholding certificateMain employer, secondary employment, freelance or contractor payments — including small amounts where 10% was withheld.
3Review dependantsCheck the list of dependants and the number of months counted; if any are missing, register them before preparing the return.
4Identify the tax office that will receive the documentsUnder the long-standing rule: if an organisation applied your personal deduction, file with the tax office managing that organisation; if you changed jobs, go by the last place that applied the deduction; if no one applied it, file where you reside.
5Prepare the return on the tax mobile app or e-tax accountUse the pre-fill function based on the data organisations have declared as a starting point, then check each line of income, tax withheld and deductions against the documents you have gathered.
6Handle the resultIf you owe additional tax, pay it by the same deadline as the return. If you have overpaid, choose to receive a refund to a bank account in your own name or apply it as a credit against a future period.
7Follow up after filingCheck the acceptance notice and refund status; respond if the tax office requests further information. If you discover an error, file a supplementary return; do not file an additional original return.

What to prepare

Described by content; the exact form is taken from the system when filing. Tick what you already have.

Personal identification number and e-tax account password (or electronic identification account, if the app allows login that way)
Withholding certificates from each payer of income during the year
Summary table of income during the year: payslips, income confirmation from each source
List of registered dependants and the number of months counted
Evidence of other deductions: compulsory insurance contributions paid, and donations to charity, humanitarian causes and study promotion through eligible organisations
Income documents and tax paid abroad, if you have foreign income
Bank account number in your own name to receive refunds
Name of the tax office receiving the documents, found by searching the tax code of the company that calculated your deduction

Where to file

Annual finalisation return: Tax mobile app or personal e-tax account, selecting the tax office according to the principle in step 4.
Payment of additional tax owed: Tax payment function on the tax mobile app, e-tax account, or through a bank.
Filing paper documents (when electronic filing is not possible): The corresponding tax office according to the principle in step 4.

Find the official channel by name (the e-tax system, the tax mobile app, the e-invoice portal, the National Business Registration Portal) and check that the domain belongs to a government body before signing in. Never give your password or digital signature to strangers.

Common mistakes

Clicking to accept suggested figures while one income source has not been declared or has been declared incorrectly.
Selecting the wrong tax office — the file is returned or sent around in circles.
Husband and wife both claiming the same dependant.
The refund account is not in the name of the taxpayer.
Forgetting a small income amount on which 10% was withheld at a secondary workplace.
Filing an additional initial return instead of a supplementary return when an error is discovered.

Explainer articles

5 explainer articles on this procedure on CongThue.com (in Vietnamese).

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Related procedures

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Questions and answers

When is the deadline for personal income tax self-finalisation?

The last day of the 4th month following the calendar year, in accordance with the Law on Tax Administration. If there is an amount due, payment must be made by the same deadline; it is advisable to check for any updated guidance if there are changes to the deadline.

If I change companies mid-year, should I self-finalise or authorise?

Usually self-finalisation, because you have salary from two sources during the year. The exception is a change due to enterprise reorganisation (merger, division, etc.) under the conditions set out in guidance documents; in that case you may authorise the new employer.

If I finalise on the mobile app, do I need to submit any documents with it?

The return filed on the app uses data already declared by organisations, but you should still keep withholding certificates, dependant documents and deduction evidence for cross-checking and to answer if the tax authority asks further questions — especially if your self-entered figures differ from the system's suggested figures.

Reference content, written from general rules and possibly not yet updated for new documents; it does not give form numbers, penalty amounts or processing times. TaxDatum.com is run by a private company and is not a government portal. Before applying it to a real case, ask the managing tax office or a qualified professional.