Currently you can use an invoice discount in a sales invoice which is connceted to a job. After posting the job ledger entry does not know anything about the invoice discount and is different to the "revenue" G/L entry. The consequence is, that WIP is wrong. There is a differece between G/L and (job-)subledger.

MS Support said "it is By Design". From our point of view it should be solved.
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Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future.

Best regards,
Business Central Team