The Sage site (gosh I can't believe I'm going to say this) has a pretty good set of documents that you could easily ""adapt"" to your needs.
Need to be logged into Atlas, then use this link
https://partners.sagenorthamerica.com/irj/go/km/docs/sageKM/Sage%20MAS%2090%20and%20200/Gated%20Customers/Browsable/Year%20End%20Processing%20Guidelines%20Page%20for%20Sage%20100%20ERP.html