One can sign up in NAV’s Online Account system

One must register for the mandatory billing service from 1 July who issues a minimum of 100,000 HUF VAT invoices for domestic taxpayers, either by billing or with billing program.

In the online account system of the National Tax and Customs Administration (NAV), the registration can be done from now. Customer access is required.
According to the tax authority’s announcement published on Monday, the interface can be found at www.onlineszamla.nav.gov.hu/regisztracio.