Thanks for the information.. I will need to do some research on this.. 

Hi @Bob@TED,

Thanks for reaching out. If you're finding that Sales tax is not calculated correctly in Sales Order or Acounts Receivable, please see this article (I copy / pasted the steps below):

Cause

Sales tax is not calculated or is miscalculated when the following occurs:

• Sales Tax Class is not selected in Sales Tax Code Maintenance for sales
• Sales Tax Rate is not correct in Sales Tax Code Maintenance
• Sales Tax Schedule does not contain the correct Sales Tax Codes

Resolution

1. Open Library Master, Setup, Sales Tax Schedule Maintenance
   • Select, Sales Tax Schedule assigned to Customer
   • Verify the correct Sales Tax Codes are selected
   • Leave window open

2. Open Library Master, Setup, Sales Tax Code Maintenance
   • Select, Sales Tax Code(s) from Sales Tax Schedule above
   • Verify, Sales Tax Rate percentage, change if not correct
   • Check, Sales box to use in Sales Order and Accounts Receivable
   • Click, Accept
   • Repeat for all Sales Tax Codes assigned to the Sales Tax Schedule

There's also this related resource:

• How to Set Up Sales Tax Classes, Tax Codes, and Tax Schedules