The "E-Invoices (EFX)" functionality is used to generate EFX files with electronic invoices to transfer to NFZ SZOI system. After selecting this functionality there is displayed a list of contracts with the NFZ. Agreements are divided into years (agreements with consecutive years are available in separate tabs). Below the list of agreements, there is a button "Invoice without contract" that allows one to issue an invoice with any items and with the NFZ as the recipient.

At each agreement there is displayed the "Select" button, which when pressed displays a form of parameters of created EFX file. In this form you have to specify the creation date of the message, select an appropriate template of bill (ZRZ file) downloaded from NFZ SZOI system and loaded earlier to the jHIS system (templates with electronic document issued are marked with character ®), enter document number and in case of correctives – also select corrected document. PKWiU code and legal basis are filled by default, but they can be modifying.

In the case of contracts for which the NHF does not provide bill templates, instead of indicating the bill template, the "document without template" field should be checked. The document positions section will then be displayed in the form, in which one must enter the year and month for which the settlement is generated and the number of particular positions. In the case of issuing a correction, one should enter the values that should be after the correction in the quantity fields. The remaining data should be completed in the same way as when issuing a document with a template.

After completing the form and pressing the "Generate" button, the EFX file with electronic invoice is created and over the form there are displayed links to download the created EFX file and to download invoice printout in PDF file. Created EFX file should be downloaded by clicking on the link, saved on disk space and transferred to NFZ SZOI system.

To issue an invoice not related to any contract with the National Health Fund, click the "Invoice without contract" button under the list of contracts. Then the invoice form will be displayed. Each invoice position is a set of four data: unique product code, product name, unit price, and quantity of units. By default, the form displays one line that allows you to enter one invoice position. To enter more positions, click the "More positions" button - each click of it displays an additional row for the data of the next position. Positions without the specified number of units will be ignored when generating an invoice. In the form, it is also possible to choose a predefined set of invoice positions - after selecting it, the system automatically displays the invoice positions from a given set, leaving the user to enter only the number of units.

After completing the form and clicking the "Generate" button, an invoice is created and a link is displayed above the form, enabling it to be downloaded (in PDF format) and printed.