The project involves building a web-based accounting application that lets me handle day-to-day invoicing and track expenses by cost centre without leaving the browser. Key deliverables I need: • Customer invoicing: screen to enter line items, taxes and due dates, plus PDF or email output. • Expense capture: monthly entry form that tags each transaction to a cost centre and stores running totals. • Security: user sign-up / login and a role-based permission layer so clerks, managers and admins see only what they should. Everything should run smoothly in a modern stack of your choice—feel free to recommend the best fit—as long as the final product is accessible from any standard web browser and is easy for me to maintain and extend later. A clean, intuitive UI, well-structured database and clear documentation are expected with the final hand-over.