The Nordic Smart Government & Business (NSG&B) 4.0 programme 2021-2024 drives cross-border digitalisation for Nordic SMEs, enabling seamless trade and data exchange. Government agencies and private sector partners have developed solutions for automated data sharing, reporting, and digital wallets. Key achievements include a Nordic API for public registry data, a shared financial vocabulary, and contributions to digital wallet initiatives. The NSG&B case catalogue features 8 examples of how businesses and European initiatives in the area can leverage its work on eInvoicing, KYC processes, and digital wallets, showcasing the potential for wider adoption and innovation.