1) ENTER THE FINANCE PORTAL https://www.portaldasfinancas.gov.pt
1.1) CLICK ON THE START SESSION BUTTON
1.2) CLICK ON SERVICES
1.3) CLICK ON USER MANAGEMENT
1.4) CLICK ON CREATE A NEW USER
1.5) SELECT WFA TO COMMUNICATE TAX INVOICES
1.6) SELECT WDT TO COMMUNICATE GUIDES
1.7) SAVE THE CREATED USER NUMBER
2) JOIN onlinebiz https://www.onlinebiz.pt
2.1) CLICK ON BILLING
2.2) CLICK ON SETTINGS
2.3) CLICK ON COMMUNICATION AT
2.4) PUT USER DATA AT CREATED