Adding tax lines to an order via API

Topic summary

How to add tax lines to an order via API after the order is created through POS (point-of-sale). The author cannot find any API endpoint/request that supports adding tax lines post-creation and is asking for guidance. No responses or solutions yet; the question remains open.

Summarized with AI on December 28. AI used: gpt-5.

Hello,

Once a order is created through POS, how can I add tax lines via API? I don’t find this functionality in any of the requests that I know.

Kind regards,