Compile, cancel, specify, offset, etc. an electronic tax invoice (EVHF) "online". You can find the information you need to perform the operations in the Help section.
You can use the Electronic Invoicing Program (eFP) to prepare EVHFs "offline". You can get acquainted with the installation of the program, download of invoice packages prepared by eFP and the user instructions of the program from the following links
Codes of goods used when filling out an electronic tax invoice
You can get the codes of goods (works and services) for the preparation of electronic tax invoices here.
Format and examples of electronic tax invoice files
Taxpayers who want to automatically create an electronic tax invoice through their internal information systems can get acquainted with the XML format of VHF files here.