This update adds a safeguard to ensure OSS tax labels set on products are correctly carried through to invoice and tax accounting entries. This helps businesses relying on EU OSS reporting get more consistent tax report data and reduces the risk of manual correction.

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When using OSS, the user has to put the OSS tag on the product. This test ensures the OSS tag is well propagated from the product to the accounting items representing the invoice line plus the generated tax lines.

task_id: 4789153