I would like to configure a payment term of 90 days since invoice date and day 20.
This means that if invoice is 20/12/2015, then:
20/12/2015 + 90 days = 19/03/2016, so due date would be 20/03/2016.
But if configured 90 days + day 20 Odoo will go for day 20th of the next month (20/04/2016).
Is it possible to configure due date to be 20/03 in this case?