Sir Cancelot says: Wave is free and this prompt writes the invoice. QuickBooks can keep its $38.
Create a professional invoice in plain text/table form for: my business [NAME], client [CLIENT], services [LIST WITH PRICES], due in [DAYS] days, payment methods [METHODS]. Then write 3 payment reminders: friendly (3 days before due), firm (7 days late), final (21 days late). Keep each under 80 words.
Works in the free versions of ChatGPT, Claude, Gemini and Copilot. Never paste passwords or account numbers.