Managing your client database is essential for efficient invoicing: **Adding a New Client:** 1. Go to Clients from the main menu 2. Click "Add New Client" 3. Fill in the required information: - Client name - Email address - Phone number - Billing address - Additional contact details 4. Save the client **Managing Existing Clients:** - View all clients in the Clients list - Click on a client to view their details - See all invoices associated with the client - View payment history - Edit client information anytime **Client Features:** - Quick access to client's invoice history - Payment tracking per client - Contact information management - Notes and additional details - Export client list **Best Practices:** - Keep client information up to date - Use consistent naming conventions - Add notes for special instructions - Regularly review and update contact details Having accurate client information ensures invoices are sent to the correct recipients and helps maintain professional relationships.