Drawing PTO - REST API

This information is not stored directly on the document.

It is necessary to access the document including its relations:

Example call https://demo.flexibee.eu/c/demo/faktura-vydana/1.xml?relations=vazby&limit=0

This way we can determine which invoice line items the advance tax document (ZDD) is linked to (deducted against), and then look up the value of those items.