Can you manually specify invoice due date

We have 6 payment terms set up in our billing module. For example, payment due 20th of month following invoice date, payment due 10 days from invoice date etc, but what I am trying to find out is can you specify a due date for an invoice. For example, create an invoice where payment is due on the 18th of November and so on, or do you have to stick to the payment terms you have set up in the billing module?

We are on Psft 9.2.

Thanks

Claire