The invoice page, the card payment flow, and how bank details are shown.

What accepting an offer drafts, what decides the schedule, and how to create a deposit invoice yourself.

Bank transfer or card, and how each one gets marked paid.

Uploading invoices from another tool: what you can upload, the review screen, and what gets created.

Draft, Pending, Paid, Refunded, and what you can change at each point.

Who can refund, how each payment method is refunded, and what a refund changes.

Entry points, the invoice form field by field, defaults, and what sending does.