Where do I set the terms?
- For the business: Default payment terms (days) in Settings → Business. It applies to new invoices.
- For one customer: Payment terms on the customer, either Business default · … days or Custom terms with Days after invoice date.
Can I change the due date after issuing?
No. An issued invoice keeps its due date. If it is wrong, correct the invoice with a credit note and issue a new one. Payment reminders count their days from the due date.
If something goes wrong
- "Enter a whole number from 0 to 365 days."
Explanation written from the Deline app's own screens and texts (build eba146497 (Deline cf723fe1f)); it has no steps to check.