OME2 / OBB8 - Define Terms of Payment

Create a new Payment Term or Copy an existing one and call it say "EX45"
Give it a 'Sales text' - appears on sales invoice if you will use it for Customers
Select applicable for Vendors and/or Customer - tick boxes
Leave 'Baseline date Calculations' blank
Choose 'Document Date' as default for 'Calculation of Baseline Date' - radio button
Leave payment block / payment default blank - unless you wish to have defaults applicable for this payment term only
In the 'Payment Terms' Section - on the 'Term 1' line leave everything blank except put 45 in the 'No/days' column

This means that when you choose this payment term, the baseline date is adopted from the document date and the due date is
equal to baseline date PLUS 45 days.

Terms of Payment

Customer payment time-frame allowed and the discounts amount given for early payment if any.

Day Limit - e.g. if you enter 15

An invoice date on or before the 15th of the month are payable on the last day of the next month

An invoice date after the 15th of the month are payable on the 15th of the month after the next month.