The Day Books form displays the day books used in this fiscal year.
Day books are managed centrally on the Day Books (Central Data) form, in the Central Data section. This means it is not possible to add or delete day books directly from the Day Book form of the fiscal year.
It is possible, however, to change all day book details in this fiscal year (including description and settings), without this having an impact on the central data, as you are working with a copy of the central day books. To add a new day book to this fiscal year, or to delete an old day book from the fiscal year, use the Central Data. Any changes you make there are immediately reflected in your current fiscal year. Please note that the changes are also implemented in all other databases that are managed centrally.
Note: At the end of a fiscal year, you can create a fiscal year for the next year by copying the current fiscal year. All day books and their details will be copied from the previous fiscal year, so that the descriptions and settings match those of the last fiscal year.