Sales Markdowns

Hello

In our Sales Order Processing Setup we have 'Posting Account From' marked to 'Customer'.

We are now looking at introducing Markdown values in Sales Transactions, but there is no default under Debtor Maintenance/Accounts for Markdowns.

We are using eConnect to integrate sales from a website and so far in testing the markdowns distribution is always blank and the document won't post.

Is there any way to resolve this?

Thanks