In NT 2021.003, only standard GTIN barcodes duly registered in the GS1 (Barcode System) database will be accepted for the cEAN (barcode of the product) and cEANTrib (barcode of the taxable unit) fields. A validation rule is also provided in this technical note by crossing the tax document's product information with GS1's registration information for the aforementioned GTIN.   When the marketed product has a barcode with GTIN, the SINIEF Adjustments 07/05 and 19/16 require the cEAN and cEANTrib fields to be filled out on the Electronic Invoice (NF-e) and the Electronic Consumer Invoice (NFC-e).   Changes introduced by the...