The Invoices tab bills your own customers — the money never touches us.
1. Payment details (once): your business name and your existing payment link — Stripe, PayPal, whatever you already use. It becomes the "Pay this invoice online" button on every PDF.
2. Create an invoice: client, line items, due date. Totals are computed exactly, in cents.
3. Send it — one click emails the PDF to your client from your name (replies come to you) — or download the PDF and send it yourself.
4. Track it: Draft → Sent → Paid (you mark it — you know your bank account, we don't and shouldn't). Paid and Void are final.
The pay button opens your payment page; StartupOPS generates the paperwork and keeps the ledger honest.