The Open item link option will launch the "Open item link" form for the debtor (customer / client) account associated with the selected document, if Invoices, Credit notes or Quotes document type is selected. 

If purchase documents, (Purchases, Supplier returns or Orders document type is selected, the "Open item link" form for the creditor (supplier / vendor) account associated with the selected document will be launched.  

You may view all the transactions and process open item links for the selected account. See - Working with Open item.

To launch the Open item link for a selected document: 

1.On Input → Documents (Documents list screen), select the Document type, if the correct document type is not selected.

2.Right-click on a selected document. On the context-menu, select the Others → Open item link option. 

This will launch the "Open item link" form for the debtor (customer / client) account associated with the selected document.

TurboCASH4 Document list screen context-menu Open item link