E-Invoice, which is in practice, is an electronic document in which the communication between the seller and the receiver is carried out via a central platform (IOP), where the data format and standard are included in the information required by the IUC to be included in a bill required by the VUK. E-Invoice is not a new document type, but has the same legal qualifications as the paper invoice.

Taxpayers whose billing requirements differ or organize billing has been provided with the opportunity to send and receive electronic bills via a data processing system of a specialist with a technical competence. E-Invoices created by the system used by the taxpayer are transferred to the company that performs the special integration, and the company that performs the special integration transfers these invoices to the IOP. For the incoming E-Bills, the invoice is delivered to the taxpayer system by the private integration firm delivered to the private integration company by IIC in a similar construction.

E-Invoice solution Workcube is an application that works on ERP application and integrates with various special integrators. The E-invoices created in the Workcube system are transmitted to the company that performs the special integration, and the company that performs the special integration transfers these invoices to the IOP. For the incoming E-Bills, the bills delivered to the private integration company by IIB in a similar construction are delivered to the Workcube system by the special integration firm through the solution.