Links were published in the SC Payroll 2.0 Roundtable thread, another thread with PR issue, and Evernote and include four PR 2018 specific articles provided to us directly from Sage Development from questions raised at the Roundtables, you'll find them here:
https://90minds-com.socialcast.com/messages/38539248?ref=group or Evernote under the Sage 100 Financials notebook.
The checklists for Sage are now browser based, no login required. A link to them was added a while ago under the Socialcast Helpful Links shorts-cuts (helpful links is a misnomer since you can't see links on the mobile version of SC). While in a browser based session of Socialcast you can open the Helpful Links by clicking the icon to the right of the gear icon under Home section. The link is titled Sage 100 Help, File Layouts, Install Guides etc. 4.50 - 2018 - for ease of access:
http://help-sage100.na.sage.com/2018/index.htm
From the Help-Sage100 Link, click the User Guide hyperlink on the right pane. The attached is a screen image of the guides that are available (I expanded Payroll and v. 2018 for illustration purposes).