Vital GL
Why isn't the voucher number displayed as year+month+date?
There are two numbering rules of the voucher:
1. Year+month+date+serial number (NN YYYYMMDDXXXX)
2. Year+month+serial number (NN YYYYMMXXXX)
Go to [Maintenance] > [Parameter setting] to select preferred voucher numbering rules.

https://faq.vitalyun.com/EN/Finance#2758