The ELMI ECR + application was developed in order to offer solutions in the field of retail. Those professionals who have tax cash registers of ELMI SYSTEMS will have the opportunity to issue documents (retail receipts and invoices) through the application which will be printed on the tax cash register of their company. The application also sends the documents directly to the myData service as well as to the accountant of the entrepreneur. Thus, an application has been developed in order to help the operation of the entrepreneur who has a tax cash register of ELMI SYSTEMS, improving his daily life.