In the 2024 flat-rate regime, with the introduction of mandatory e-invoicing for flat-rate taxpayers, some important changes emerge on the formal side. One of these concerns the numbering of invoices: e-invoices and paper invoices can continue numbering consecutively, but it is essential to ensure uniqueness and the absence of duplication or skips in the numbering of e-invoices (it is recommended to start the year with e-invoice number 1). Another novelty relates to the use of revenue stamps, which effectively replace the VAT payment for flat-rate taxpayers.
In the software used to compile e-invoices, there is a section called "Virtual Stamps." Here, you must select "Yes" to add the virtual revenue stamp. Payment is made according to the stamps used (2 euros each) every three months (May 31, September 30, November 30, February 28 of the following year). If 5,000 euros is not exceeded in the first quarter, payment is postponed until September 30; if 5,000 euros is not exceeded between the first and second quarters, payment is postponed until November 30. Payment of the amount due can be made by F24 form or by current account, using the Revenue Agency's application.