Question or Problem Statement:
Is it possible to adjust the due date of an invoice after it has been posted?
Invoice Due Date is driven off the value assigned in the payment terms field at the account level. As indicated in our Knowledge Center, invoice due date can be queried and filtered, but not updated.
If the payment terms on an account is updated, only subsequent generated invoices will reflect these changes. For an existing posted invoice to reflect the new payment term, you'll need to cancel post, delete said invoice and create a bill run, in order to generate a new invoice with accurate information.
Re: Adjusting the Due Date of an Invoice
A brief update on this.
Due to new functionality the due date on an invoice can be updated through a REST API call.
Currently this can only be done through an API call.