Online Számlázó1.27 - App Store

Mobile application for Online Invoicing System of the National Tax and Customs Administration of Hungary (NTCA)

The Online Invoicing mobile application is a free invoicing program created by the NTCA, which is also downloadable to smart devices with iOS operating system.

Role of the application
The application unifies important features and operations of Online Invoice System and Online Invoicing Program in a portable format.

Conditions necessary for using the application
For using the application, the user must register for the Online Invoice System and must meet the following conditions:
. Operating system iOS 11.0 or higher version
. Active internet connection

Operations that can be performed in the application, for instance:
. Issuing invoices: usual invoice, prepayment invoice, invoice modifying the original invoice not issued by this software, invoice cancelling the original invoice not issued by this software
. Submitting real-time data on issued invoices to the NTCA
. Viewing issued invoices in PDF format and forwarding them
. Creating and modifying customers
. Issuing invoices with customer in them
. Creating and modifying products
. Issuing invoices with products in them
. Querying statistics
. Viewing incoming and outgoing invoices
. Approval of technical cancellations
. Querying taxpayers
. Managing invoice pads
. Access to news published in the Online Invoice System

After having the application downloaded, it is possible to enter the application via the Online Invoice System, with a QR code identification.
It is possible to enter the application with primary and secondary user ID as well. Primary user can change rights of the secondary user in the Online Invoice System.
It can be seen in menu of the application, what functions correspond to which web interface system (Online Invoice System, Online Invoicing Program).
Within the Settings menu, it is possible to change the language of application to English or German.

Version History We have implemented the VAT changes affecting prescription-only medicines and, for more transparent administration, we have also clarified the amounts displayed in payment reminders. 1.27 Oct 5 In the latest version, you can now record customers’ email addresses and send invoices directly from the app to the specified email address, including attachments (e.g., photos, documents). In addition, you will now be able to send payment reminders for issued invoices. 1.26 Aug 26 Multiple bank account numbers can be entered in the account issuer's details, and the default format of the account – whether electronic or paper-based – can also be set. 1.25 Apr 16 This version includes a new validation of the referenced invoice number, and the unit price can be specified with four decimal places. 1.24 12/17/2025 The new version follows the current legal regulation of CDV control numbers and allows the selection of “domestic VAT taxable person” type customers in the case of an EUE VAT rate (a non-reverse charge transaction carried out in another Member State). 1.23 12/09/2025 In this update, we have clarified the calculations and validations related to invoicing, improved the management of discounts, and refined the management of templates and tax bases. 1.22 10/08/2025 In this update, we have modified the process of recording Hungarian tax numbers upon invoice issuance and customer management, and we also made the exchange rate handling more accurate. 1.21 09/15/2025 - We made the operation related to the connection between “Hungarian tax number” and “Group member tax number” more user-friendly. In certain cases, we introduced a new way of error management and messages that facilitate navigation for users.
- In order to enhance user experience, we performed further bug fixes in the application. 1.20 06/12/2025 - In the 'Customers' tab, it is now also possible to record the tax number of the group member, so that the invoices issued to the registered partners can also contain information on the VAT group members.
- Minor bug fixes and performance optimisations. 1.19 03/25/2025 Changes that help ensure the safe use of the application, but do not affect functionality. Minor bug fixes and performance optimizations. 1.18.1 01/30/2025 Previously, the system only managed the group tax number for the seller data. This is now possible by extending the functionality to customer data.

The application has been supplemented by the introduction of predecessor-successor functions:
• if the logged-in user has predecessors, a new option is available on the interface to view the invoices of the predecessor,
• in cases of succession, the successor can issue an invalidating (and modifying) invoice by referring to the invoice of the predecessor. 1.18 01/02/2025 The "settle the invoice" function of the application has been enhanced.
The new labelling system:
- Unsettled
- Settled
- Partly settled

The status of the invoice settlement is displayed on the invoice list page and on the details page.

A new operation „Payments” is available for the invoice issued.
On the Payments screen, the payments for the invoice are displayed.
The previous "settle the invoice" operation is also retained. 1.16 10/03/2024 Development
Recording the data erasure code required for the permanent deletion of the data stored on the durable data storage device on the invoice and establishing the related data provision.

Correction of error
Full visibility of the "Date selector" function under the "First registration" date field when modifying a KBAÚK VAT-rated product. 1.15 08/20/2024 Bug fixes
• The payment cancellation function is working correctly again.
• Changing the date format - Previous values were transferred between client and server in epoch format, now they are treated as string dateTime.
• Setting the replacement of the firebase token on expiry, so that devices can continue to receive notification-based messages.
• Extension of currency types with Kazakhstani tenge value.
• Display related fixes. 1.14.2 07/31/2024 Bug fixes
• Correct display of payment deadline if we change the Payment method to cash
• Introduction of the validation of basic invoices issued on the Online Invoicing System in case of issuing non-system invoices
• Taxpayers with only lot number can also register in the Online Invoicing System
• The invoice can be issued and the customer can be saved by fixing validation error in the Customer short name field
• In case of EUFADE and KBAÚK VAT rates only non-EU VAT number fields can be edited, the fields of additional tax numbers cannot be filled in
• Error messages appear when non-system invoices referring to themselves
• Non-system annul/modify invoice issuing for manual invoices is also allowed in the mobile application 1.14 03/13/2024 Novelties
• 0% VAT rate for daily newspapers to be introduced from 1 January 2024. 1.13 12/19/2023 Novelties, error corrections
Installation of this version does not contain any novelty or error correction. Installation is solely necessary because of the change of the machine-to-machine interface encryption SSL certificate. 1.12.1 01/05/2023 Bug fixes
• Net value of the total amount of invoice cannot be negative even in the case of modifications.
• Displaying the serial number of the invoice amongst details of modified invoices. 1.12 12/07/2022 Novelties, bug fixings
• If the invoice includes an advance payment item, a total discount cannot be provided.
• In the list of my invoices, among the invoice operations, the possibility of technical cancellation has been removed.
• A request for technical cancellation can now only be submitted via the web interface of the Online Invoice System, as well as on Menu tab via the My Outgoing/Incoming invoices interface in the Online Invoice System section.
• Other bug fixings. 1.11 11/02/2022 Latest updates, bug fixes
The bug that caused the application to stop running when using account operations on mobile phones with the iOS 16 operating system - due to changes in the internal workings of iOS - has been resolved. 1.10.2 09/23/2022 Novelties, error corrections
• Corrections related to querying invoice pads. 1.10.1 08/08/2022 New features, bug fixes
• The product name changes from the current minimum of 1 character to a minimum of 2 characters when the product is saved in the product list.
• While creating an invoice, when editing the product, if the Advance Payment switch is active and the invoice type is not Advance Payment Invoice, the Check Advance Payment Invoice button will appear below the extra fields for the advance payment.
• On the My Products and My Customers page, you must enter a minimum of 2 characters in the name search box at the top to start the search.
• Bug fixes. 1.10 07/04/2022 Latest updates, bug fixings
• Introduction of new VAT rates
- KAU_AK – Margin scheme – travel arrangement 27%
- KAU_AM – Margin scheme – travel arrangement tax-free
• Select invoicing name in profile
- On profile side, if at the user "Seller’s name" (name) and the "Seller’s short name" (shortname) is completed, then above "Seller’s name" a new option appears titled "Preferred invoicing name".
- The two options are "Full name” and "Short name".
• Use of a short name for my customers
- When adding a new customer a field "Customer’s short name" appears under "Customer’s name". The completion of this is optional and it can be up to 120 characters long.
- New sorting option on the list my customers with "By short name" field.
- New filtering option on the list my customers with field "Customer’s short name".
• Bug fixings and further exception handlings 1.9 05/11/2022 Error correction:

• Correcting interface drawing error on iPhone 5S and old SE devices
The patch has eliminated the bug on some devices where the app rejects the user tapping the “Add a new product” button in the course of issuing a new invoice. 1.8.1 03/17/2022 Novelties, error corrections

• Introducing a new address type for taxpayer queries
• Permanent establishment
• Introducing new VAT rates
- NO_VAT_CHARGE – There is not input VAT
- UNKNOWN_VAT_EXEMPTION – Unknown (Tax exemption)
- UNKNOWN_VAT_OUT_OF_SCOPE – Unknown (Out of scope of the VAT Act)
- REFUNDABLE_VAT_27 – Refundable 27%
- REFUNDABLE_VAT_18 – Refundable 18%
- REFUNDABLE_VAT_5 – Refundable 5%
- NONREFUNDABLE_VAT_27 – Non-refundable 27%
- NONREFUNDABLE_VAT_18 – Non-refundable 18%
- NONREFUNDABLE_VAT_5 – Non-refundable 5%
- UNKNOWN_VAT_AMOUNT_MISMATCH_27 – Unknown (Mismatch between tax base and input tax) 27%
- UNKNOWN_VAT_AMOUNT_MISMATCH_18 – Unknown (Mismatch between tax base and input tax) 18%
- UNKNOWN_VAT_AMOUNT_MISMATCH_5 – Unknown (Mismatch between tax base and input tax) 5%

• Using “unknown” VAT rates when invoices are issued
When invoices are generated, the VAT rates enumerated hereunder may only be opted for modifying / cancellation invoices for original invoices not issued by this software
- UNKNOWN_VAT_EXEMPTION – Unknown (Tax exemption)
- UNKNOWN_VAT_OUT_OF_SCOPE – Unknown (Out of scope of the VAT Act)
- UNKNOWN_VAT_AMOUNT_MISMATCH_27 – Unknown (Mismatch between tax base and input tax) 27%
- UNKNOWN_VAT_AMOUNT_MISMATCH_18 – Unknown (Mismatch between tax base and input tax) 18%
- UNKNOWN_VAT_AMOUNT_MISMATCH_5 – Unknown (Mismatch between tax base and input tax) 5%

• Change in validating IBAN identification number 1.8 02/23/2022