I need a Microsoft Access solution that centralises all of my customer data so day-to-day administration becomes faster and far less error-prone. The database must focus on full customer lifecycle management rather than simple record keeping. Core functions I want to see working smoothly: • Contactinformatie opslaan – every customer’s address, phone, e-mail and other key fields captured with validation. • Klantenactiviteit bijhouden – quick entry screens and history logs so I can trace calls, meetings and support requests at a glance. • Facturen en betalingen beheren – a straightforward way to raise invoices, record payments and view outstanding balances, with summary and detailed reports. The finished file should be an .accdb that opens without security warnings, includes clearly labelled tables, user-friendly forms, meaningful queries and printable reports. A compact instruction sheet or on-screen help notes will ensure colleagues unfamiliar with Access can begin using it immediately. Once the core build is complete, I may expand the project with automated e-mail reminders and deeper analytics, so clean, well-commented design now is important for future growth.