I cannot find an invoice in the cash book, but it is created.(CQ00258)

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If an invoice does not appear in the cashbook, it can only be for 2 reasons.

It was written with a different VAT (shown as 0%, 7%, 19%). Maybe it was from a time when 16% was available.
It was written with a payment type that is not displayed in the cash book. You can see which ones are displayed in the cash register settings.The default here is cash and EC card payment.