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How-to · KROS

KROS OMEGA: invoice import and export

Verteco Peppol supports the KROS OMEGA format in both directions: invoices that reach you through the Peppol network are downloaded as a file that KROS OMEGA imports without retyping, and invoices issued in KROS OMEGA are uploaded to the portal and sent to your customers through Peppol. Amounts, VAT rates and document numbers are always taken exactly from the invoice; nothing is recalculated. Why e-invoicing is worth sorting out alongside KROS OMEGA is explained on a separate page.

We offer no direct connection to KROS Digitálna kancelária or to the KROS API. Received e-invoices get into OMEGA through the text import: one at a time from the invoice detail, in bulk from Exports, or by a scheduled export to the accountant's e-mail (daily, weekly or monthly).

Verteco's price is public and the same for everyone (price list); fees for a module, licence or update of KROS OMEGA are its vendor's fees agreed with the vendor.

1. Move invoices from the portal into KROS OMEGA

Download received and issued invoices in bulk for a chosen period, or one at a time from the invoice detail.

  1. 1
    In the portal open Exports (left menu, address /dashboard/exports). Choose the company; if you like, narrow the period From date / To date and the direction (Received and sent, Received only, Sent only).
  2. 2
    In the Accounting software formats section click Download on the KROS OMEGA (.zip) tile. The file peppol-omega.zip downloads.
  3. 3
    Unzip the file. It contains:
    • omega_doklady.txt – one text file for the OMEGA import: a partner block (R00 T04) and a document block (R00 T01) with R01 headers and R02 lines; customer invoices (type 0, ledger OF), issued credit notes (type 4, OD, with negative amounts) and incoming invoices (type 14, DF); TAB-separated, Windows-1250, dates DD.MM.YYYY
    • _preskocene.txt – documents the format cannot carry, with the reason for each
  4. 4
    In KROS OMEGA open Firma → Import → Import z textového súboru. The wizard loads one text file with both partners and documents (the same shape OMEGA itself produces via Firma → Export → Export do textového súboru). The field layout follows the KROS sheet „ImportExport 28.00 (2025)“. Back up the company before the first import. Source: vendor documentation ↗
  5. 5
    If a document is missing, look into _preskocene.txt: every omitted document has its reason there (see What the format cannot carry). Nothing is left out silently.

One invoice: in the invoice detail, section Accounting data, use Export this document to… and pick KROS OMEGA. A selection: tick documents in the invoice list, choose KROS OMEGA in the Accounting software field of the bar below the list and click Download.

What to know before the first import

  • Documents are filed into number series by ledger code: OF (customer invoices), OD (issued credit notes) and DF (incoming invoices). If your OMEGA uses other series codes, choose them in the wizard during the import.
  • VAT is carried in OMEGA's groups: nižšia (lower, 19 %), vyššia (higher, 23 %), znížená 2 (reduced 2, 5 %), 0 % (exempt, reverse charge, intra-EU supply) and neobsahuje (none: supplies outside VAT, for example an invoice from a non-VAT-payer). The header carries the rates as they are on the document, so older documents with 20 % or 10 % go through as well.
  • The portal does not fill in the account (S účet), the VAT control statement section or the tax return line; OMEGA adds them from its own posting rules when posting. The portal does not know your chart of accounts.
  • OMEGA has no separate import type for an incoming credit note: it is in the file as an incoming invoice with negative amounts, that is, the way it is recorded in the program manually as well. The document note carries the number of the original invoice.
  • Lines go in as free lines (type V), without a link to stock cards or the service price list; the unit price is always such that quantity × price gives exactly the line amount from the invoice.
  • OMEGA matches partners by company ID (IČO); the partner block in the file adds the missing ones with address, VAT ID, tax ID (DIČ) and the VAT-payer flag. A discount on the whole document is carried as an absolute document discount (fields 80 and 81).

2. Send invoices issued in KROS OMEGA through Peppol

You keep issuing invoices in your program. You upload its export to the portal and the portal delivers them to your customers through the Peppol network, with a delivery receipt and the report to the Financial Administration.

  1. 6
    In KROS OMEGA open Firma → Export → Export do textového súboru. Choose the Odoslané faktúry ledger (or Odoslané dobropisy) and the period. The .txt file is in Windows-1250 encoding; the portal reads it including Slovak diacritics. Incoming invoices in the same file are skipped by the import, with a note on each. Source: vendor documentation ↗
  2. 7
    In the portal open Send e-invoice and the Bulk send tab; the direct link /dashboard/invoices/new?tab=bulk opens the tab with the KROS OMEGA tile already selected. Otherwise click the tile and choose Select.
  3. 8
    Choose the Company (sender) and upload the exported files; you can select several at once. The portal imports only invoices you issued (supplier = your company); received invoices in the same file are skipped.
  4. 9
    Check the preview: the portal reads the lines, recalculates the totals the same way as for a manually issued invoice and compares them with the totals in the file. If they differ by even a cent, the invoice gets an error and does not leave; fix it in the program and export again. The customer must be in the Peppol network, which you check on /overenie.
  5. 10
    Click Send. Invoices leave one by one; the status and the delivery receipt are shown under Invoices – sent.

3. What the format cannot carry

The export never guesses values that the KROS OMEGA format has nowhere to store. Such a document is listed in _preskocene.txt with the reason and stays available in the portal as PDF and original XML.

  • a document in a foreign currency (the program would need an exchange rate the invoice does not carry)
  • a document with an advance payment offset against it
  • a document number longer than 20 characters
  • a document with two different rates in one OMEGA group (for example both 20 % and 23 %)
  • a document with a surcharge at document level (OMEGA only knows a document discount)
  • a document with VAT but no breakdown by rate

Something off during the import?

Send us the message from KROS OMEGA and the file you imported, through Support in the portal or to peppol​@​verteco.digital. We will fine-tune the format. You can try the whole procedure without risk in the test environment.

Other programs: MK-soft · PROLUC · POHODA · MRP-K/S · Money S3 · Money S4 / S5 · KROS ALFA plus · HELIOS iNuvio / Nephrite