Assigning sales item category to sales order type

If you want to assign sales item category to sales order type, kindly go to tcode: VOV8 and assign it based on below setting.

If you want to know how to create sales item category, kindly refer to http://rukawaw-tb.blogspot.com/2010/08/creating-sales-item-category.html

Remove credit limit check for Sales Order Type

If you dont want to have credit limit check for some sales order type, go to tcode VOV8 and leave blank for the check credit limit.

By doing this, you may control the credit limit check as per sales order.