To accomplish having an invoice due in four stages, you should assign payment terms that have four payment schedules when creating the invoice.
Let's go through each option to understand why they are correct or incorrect:
Option A) Assign an invoicing rule with four schedules - This option is incorrect because invoicing rules determine how the invoice is generated, such as the frequency or conditions for invoicing. It does not determine the payment terms or schedules.
Option B) Create four lines and assign different payment terms to each line - This option is incorrect because creating multiple lines with different payment terms would result in multiple invoices, each with its own payment terms. It does not achieve the desired result of having a single invoice with four payment stages.
Option C) Assign payment terms that have four payment schedules - This option is correct because payment terms determine the payment conditions, including the due dates and schedules. By assigning payment terms with four payment schedules, you can specify the desired stages for the invoice payment.
Option D) Assign payment terms that have four discount periods defined - This option is incorrect because discount periods determine the time frame within which a discount is available for early payment. It does not determine the payment schedules or stages for the invoice.
Therefore, the correct answer is C) Assign payment terms that have four payment schedules defined. This option is correct because it allows you to set up the desired stages for the invoice payment.