How can we insert invoices for general expenses that are not stock items (for example rent, internet, etc)? Create non-inventory items and use them in purchase orders/bills. Please read about non-inventory items in our User Manual here: /resources/user-manual/settings/system/professional-functions/non-inventory-items/ Attention! Do not forget to enter the ‘Arrival Date’. Otherwise your purchases will not be counted. Need more information? Check the User Manual or open a Support Ticket. How can we assign costs to different accounts? Please go to Stock -> Stock settings -> Product groups and select a custom account for items that belong to this group. Need more information? Check the User Manual or open a Support Ticket. Why is purchase invoices section empty for us although we have created several purchase orders? Please enter 'Invoice ID' in the PO details section, and then they will appear at: Procurement -> Invoices. Need more information? Check the User Manual or open a Support Ticket.