I'm trying to figure out how to get the vat rate for a given invoice line. Every invoice has a taxDetailLines summary with vat rates (taxId). Each invoice line has a vatId. However, if I juse the vat endpoint to get information about the vat code it doesn't show the related tax id's. Maybe I'm missing something obvious here, but how can I based on a vatId get the related taxId so I can get the vat rate?
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