This question might be about a limitation in the Fortnox API rather than Enhanza, but there appears only be a transaction date and no book date in the voucher object. We are able to get book dates from SIE files, so we’d expect to be able to get the same from the API–are we overlooking something?
Now, that’s a very good question. It’s correct that book dates newly were added to the SIE file due to stricter audit controls regulations.
But unfortunately, Fortnox hasn’t added it to their API for vouchers yet. If that’s of big important for your companies I sugget you reach out to Fortnox request it.