AFAB posting end of the year on period 13 instead of 12

Hello,

I've this request from accounting department. They would like to post depreciation for area 01 on special period 13 instead of 12 and with the following dates:

DOCUMENT DATE: 15.04.xx+1 (following year)

POSTING DATE: 31.12.xx

This because in Italy depreciation postings are part of documents for closing, and will have to appear in document journal of the following year (in month Balance approval).

Now, how can I make tr. AFAB post depreciation document with this logic?

Thanks a lot,

regards

Chiara