Before you start issuing fiscalized invoices, you are legally required to register your business premises with the Tax Administration. Although it may sound like a complicated bureaucratic process, the ePorezna system allows you to handle it entirely digitally, from the comfort of your office.
In this guide, we will walk you through the entire process of registering business premises, step by step, using real screenshots.
Step 1: Login to ePorezna and choose fiscalization
After successfully logging into the ePorezna system (using the NIAS system, e.g., via your bank’s mToken or an e-ID card), locate and click on the “Fiscalization – registration of business premises” option in the left-hand column under the “Services” category on the home screen.

Step 2: Adding a new business premise
On the next screen, an overview of your business premises will appear (if you already have any). To add a new one, click the blue “+ New business premises” button in the top-right corner of the screen.

Step 3: Data entry and the key “oznaka”
The main data entry form now opens. The most important part of this step is the “Oznaka”.
The identifier you enter here must be exactly identical to the one defined in your internal fiscalization policy and the one entered in the FIRA application settings.

Step 4: Add address and activity
Going down the form, you will come across sections for address and activity.
- Address: Click on “+ Add entry” on the right and enter the exact physical address of your business premises.
- Activity: Click on “+ Add entry” again and select the code of your main activity according to the current National Classification of Activities (NKD).
Step 5: Defining working hours
The next step is entering the working hours. Click on “+ Add entry” in the Working Hours section. First, you must select the type of working hours from the drop-down menu, and then enter the specific hours and days.

Korak 6: Unos FIRA-e kao proizvođača i održavatelja softvera
We come to the penultimate step, where you report the software you use to issue invoices to the Tax Administration. Enter data for FIRA here. Click on “+ Add entry” in the Software manufacturer/maintainer section.
Important: You must perform this step twice!
First entry (Manufacturer):
- For “Type”, check the Manufacturer option.
- Select the option indicating a domestic legal entity.
- Enter the OIB of the company that produces FIRA: 21233832319 (FIRA Solutions d.o.o.).
- Click on the “Save entry” button.

Second entry (Maintainer):
- Click “+ Add entry” again.
- This time, select the “Maintainer” option for “Type”.
- Re-enter the same data (domestic legal entity, OIB: 21233832319).
- Click “Save entry” again.

Step 7: Final data saving
Once you have successfully added FIRA as both the manufacturer and the maintenance provider (you should have two rows in the table, as shown in the image below), all that remains is to finalize the application.
Scroll all the way to the bottom of the page and click the green “Save business premises” button.

If you have carefully filled in all the mandatory fields, the system will display a message confirming that the save was successful. Congratulations! Your business premises have been officially registered, and you are now fully prepared to issue fiscalized receipts worry-free using the FIRA application.







