The core activity of TreuMi GmbH is the provision of accounting and administrative services for small and medium-sized enterprises (SMEs). This includes, in particular: accounting work (simple and double accounting, accounts payable and accounts receivable control, dunning), tax returns and registrations, value-added tax settlements (VAT registration, VAT company name changes, VAT invoice mutations), payroll accounting (ongoing payroll and salary accounting, tax returns, health insurance and VVG contributions), general secretarial work (typing, address management, database management), and invoice dunning. The company offers these services as a full-service office solution to relieve SMEs and give them more time for their core competencies.