Why online filing of returns is more profitable than paper filing

Since 2021, the Federal Tax Service (FTS) has been actively promoting the transition to electronic interaction, offering taxpayers convenient tools for remote reporting. Submitting a declaration via taxpayer personal account (LKN) not only saves time, but also minimizes the risk of errors: the system automatically checks the completed data for compliance with current forms and standards Tax Code of the Russian Federation.

According to the Federal Tax Service, in 2023 more than 80% of 3-NDFL declarations were filed online - this is 3 times more than in 2019. The reasons for its popularity are obvious: there is no need to stand in queues, fill out forms by hand or pay for the services of intermediaries. In addition, the electronic declaration is processed faster: the average time for a desk audit has been reduced from 3 to 1.5 months. And for those who apply for tax deductions (for example, for treatment or purchasing a home), filing online speeds up the refund by 2-3 weeks.

Another plus - archive of documents in LKN. All submitted declarations and payment receipts are stored in the system for at least 5 years, which simplifies preparation for future reporting periods. And if you forgot to attach a supporting document (for example, a 2-NDFL certificate), the system can be supplemented with a file later - without re-submitting the entire declaration.

Who is required to file a return online in 2026

Not all taxpayers know that new rules for mandatory electronic reporting will apply from 2023. According to Federal Law No. 290-FZ, submit declarations exclusively through your personal account or EDF operator must:

  • 🏢 Individual entrepreneurs (IP) on any taxation system (except patent), if their income for the year exceeded 1 million rubles.
  • 💼 Individualswho received income from the sale of property (for example, a car or apartment owned for less than 3/5 years).
  • 🌍 Tax residents of the Russian Federationthose with income from abroad (including dividends, royalties or salaries from foreign employers).
  • 🎓 Undergraduate and postgraduate studentswho have received scholarships or grants that are not taxed by default (proof of benefit required).

For other categories (for example, individuals filing 3-NDFL to receive a deduction), the electronic form remains recommended, but not required. However, experts advise switching to the online format voluntarily: from 2026, the Federal Tax Service plans to introduce fines for paper reporting without valid reasons (for example, lack of access to the Internet).

⚠️ Attention: If you submit a declaration using the form 3-NDFL to receive a deduction, but did not meet the deadline (before April 30), there will be no fines. However, a delay in filing can delay your tax refund by 2-4 months.
📊 Have you already submitted a declaration through your personal tax office?
Yes, repeatedly
Yes, I tried it once
No, but I plan to
No and I don't intend to
I find it difficult to answer

Step-by-step instructions: registration in your personal account of the Federal Tax Service

Before filing your return, you must have access to taxpayer's personal account. The registration process takes from 10 minutes to 3 days, depending on the chosen method of identity verification.

The fastest option is authorization via Public services (if you have a verified account). To do this:

  1. Go to the site lkfl.nalog.ru.
  2. Click “Log in through State Services” and enter your login/password for the portal.
  3. Confirm the transfer of data to the Federal Tax Service (the system will request an SMS code).

If you do not have an account with State Services, register there in advance (you will need a passport and SNILS). Alternative ways to access LKN:

  • 📄 Personal visit to the tax office — with a passport and TIN (registration will take 5–10 minutes).
  • 🔑 Qualified electronic signature (QES) — suitable for individual entrepreneurs and legal entities (certificate cost from 1,500 ₽).
  • 📱 Mobile application "Taxes FL" — registration through a bank (Tinkoff, Sberbank, VTB).
⚠️ Attention: After registration, check the “Profile” section in the LKN - your full name, INN and registration address should be indicated there. If there is no data, contact the tax office to clarify the reason.

Make sure you have an INN (you can find it on the [Federal Tax Service](https://service.nalog.ru/inn.do))

Confirm your account on State Services (if you plan to log in through it)

Make sure your browser is up to date (Chrome, Firefox or Edge recommended)

Prepare a scan of your passport (required for some registration methods) -->

Selecting a declaration form and preparing documents

Available in the personal account of the Federal Tax Service all current declaration forms for individuals and individual entrepreneurs. Most popular:

Declaration form Who is it for? Submission deadline (2026)
3-NDFL Individual (income, deductions, sale of property) Before April 30 (if income is declared)
4-NDFL Individual entrepreneur on OSNO (calculation of advance payments) Before April 20, July 20, October 20
6-NDFL Employers and individual entrepreneurs with hired employees Quarterly, until last day of the month after the reporting period
Single (simplified) declaration Individual entrepreneur on the simplified tax system or patent (with zero income) Before 20th of the monthfollowing the reporting quarter

Before filling out the declaration, prepare a package of documents. For 3-NDFL (the most popular case) you will need:

  • 📑 Help 2-NDFL from the employer (if you are declaring your salary).
  • 🏠 Sales and purchase agreement and payment documents (for deduction when purchasing a home).
  • 🏥 Checks and contracts with medical institutions (for social deduction).
  • 💳 Account statement (if you confirm expenses for training or treatment).

All documents can be attached to the declaration in electronic form (formats: PDF, JPG, PNG). The main requirement is that the files must be readable and not exceed 10 MB each. If the scan is too large, use compression services (for example, Smallpdf or ILovePDF).

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If you are filing a return to claim a deduction, first check to see if the statute of limitations has expired. For example, for a property deduction it is 3 years from the date of purchase of a home, and for a social deduction it is 3 years from the date of expenses incurred.

Filling out a declaration in your personal account: analysis using the example of 3-NDFL

Let's look at the process using the example of the most popular form - 3-NDFL. After authorization in LKN:

  1. Go to the section "Life situations» → «Submit a 3-NDFL declaration».
  2. Select the year for which you are reporting (for example, 2023).
  3. Please indicate the purpose of filing the declaration:
    • 💰 Declaration of income (sale of property, salary from several employers, etc.).
    • 🏦 Receiving a deduction (standard, social, property).

The system will prompt you to fill in the data in interactive mode or download a ready-made file (for example, from the “Declaration” program from the Federal Tax Service). For beginners, the first option is more convenient: LKN tells you which fields are required and automatically calculates the amounts of taxes/deductions.

Pay special attention to the sections:

  • Income received in the Russian Federation — all sources of income are indicated here (salary, car sales, apartment rental).
  • Deductions — if you are applying for a tax refund, attach supporting documents (for example, an agreement with a clinic for social deductions).
  • Tax base calculation — the system itself will calculate the amount to be paid or refunded, but check that the entered data is correct.

After filling, click "Check» — LKN will identify errors (for example, discrepancies between the amounts in the 2-NDFL certificate and the declaration). Correct them before submitting.

What to do if LKN does not accept the 2-NDFL certificate?

If the system gives an error when downloading help, check:

1. File format (must be XML or PDF, signed with the employer’s digital signature).

2. The relevance of the version of the certificate (from 2022 a new form 2-NDFL is in effect).

3. File integrity (sometimes the document is damaged when downloaded from the employer’s website).

If the problem persists, ask the accounting department to re-upload the certificate or contact the tax office by phone 8-800-222-22-22 (the call is free).

Submitting a declaration and checking status

When the declaration is completed and verified, click "Send" The system will ask for confirmation - enter the code from SMS (will be sent to the number linked to the LCN). After sending:

  1. you will receive notification by email (specified in the profile) with the declaration registration number.
  2. In the section "My declarationsAccepted».
  3. During 1–3 days the status will change to "On desk check».

Declaration processing time:

  • 🕒 3-NDFL for deduction - up to 3 months (refund period - up to 1 month after verification).
  • ⏳ 3-NDFL with income — up to 3 months (if errors are found, clarification will be required).
  • ⚡ Single declaration (zero) - up to 10 days.

You can track the status in LKN or through mobile application "Taxes FL". If the declaration is “stuck” at the verification stage for longer than the deadline, write a request to the Federal Tax Service technical support through the section “Feedback».

⚠️ Attention: If you filed a tax return (for example, on the sale of a car), pay the receipt within 1 month after sending. Otherwise, the tax office will begin to charge penalties (0.06% of the debt amount for each day of delay).
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An electronic declaration has the same legal force as a paper one if it is signed with a qualified digital signature or sent through a confirmed personal account.

Common mistakes and how to avoid them

Even when filing online, taxpayers make mistakes that lead to refusal to accept the return or delay in deduction. Here are the most common:

Error Consequences How to fix
Discrepancy between the data in the 2-NDFL certificate and the declaration Refusal to accept or request for clarification Check the income and tax amounts in both documents. If there are discrepancies, request a corrected certificate from the employer.
Unattached documents for deduction Refusal of tax refund Add scans of contracts, checks and certificates to the “Documents” section of the declaration.
Invalid KBK (budget classification code) The tax will go to the wrong destination Check the current BCC on the Federal Tax Service website in the section “Background information».
Missed submission deadline (after April 30) Fine 5% of the tax amount for each month of delay (minimum 1,000 ₽) Submit the declaration as soon as possible and pay the fine (it can be reduced if you write an explanatory note).

To minimize risks, use preliminary check to LKN before shipping. The system will indicate critical errors (for example, mandatory fields not filled in). It is also useful to compare the declaration data with taxpayer's personal account in the section "My taxes"—all income known to the Federal Tax Service is displayed there (for example, according to data from employers or banks).

If you are in doubt about the correctness of filling out, use free services:

  • 🌐 Tax.ru — online calculator for calculating deductions.
  • 📱 My Tax app (for self-employed and individual entrepreneurs on the simplified tax system).
  • 📞 Federal Tax Service hotline — 8-800-222-22-22 (consultation on filling out).

FAQ: Answers to frequently asked questions

Can I submit a declaration for previous years through LKN?

Yes, you can submit a declaration in your personal account for any year starting from 2015. To do this, when choosing a form, indicate the desired reporting period (for example, 2020). However, remember that the statute of limitations for tax offenses is 3 years. If you missed the deadline for filing a return for 2020, you have no right to be fined, but you will no longer be able to receive a deduction for this period.

What to do if you forgot your personal account password?

You can restore access through:

  • 🔄 Public services — if the account is linked to a confirmed account.
  • 📧 Email — the system will send a link to reset your password.
  • 🏛️ Personal visit to the tax office — with a passport (if other methods do not work).

If you do not remember the email associated with the LKN, contact the tax office at your place of residence with your passport and TIN.

Is it possible to submit a declaration through a mobile application?

Yes, the Federal Tax Service has developed an official application "Taxes for individuals» (available for iOS and Android). The functionality of the application is almost identical to the web version of LKN:

  • 📄 Filling out and sending 3-NDFL, 4-NDFL.
  • 💳 Payment of taxes and fines.
  • 📊 View payment history and declarations.

However, for the first authorization you will need a confirmed account on State Services or registration in LKN via a computer.

How long does it take to get a tax refund after filing a return?

The return period depends on the type of deduction:

  • 🏠 Property deduction (purchase of a home) - up to 4 months (1 month for inspection + 3 months for return).
  • 🏥 Social deduction (treatment, training) - up to 3 months.
  • 👶 Standard deduction (for children) - usually returned within 1 month.

If the money is not received on time, check the status of the declaration in LKN. Possible reasons for the delay: errors in account details or request for additional documents from the tax office.

What happens if I file a return with an error?

If the error is not critical (for example, a typo in the full name), the tax office may accept the declaration, but will require clarification. In case gross violations (incorrect amount of income, lack of signature) the declaration will be returned for revision. You will have 5 days to correct any errors and resubmit it.

If you have already submitted your return and notice an error, please submit updated declaration (LKN has a corresponding option). There are no penalties for this if the clarification is made before the filing deadline.