Hi there i was using the “auto due date” suggested by @Pawan found in the following link :
But after the update to web v10.0.14 and the introduction of “payment term templates” every time that im making a new sales invoice the due date auto completes based on my previous solution and im getting the error message “Please clear the selected Payment Terms Template”.
I went to change the Credits based on fixed days for the customer but this part is missing in version 10 or it must be hidden and cant be edited or mass edited.