Hide Tax on an Estimate Record but Charge Tax on the Sales Order Generated

 1. Navigate to Customization > Forms > Transactions Forms > Standard Estimate > Customize
     Screen Fields > Items > Taxable > Uncheck Show box
     Screen Fields > Columns > Tax > Uncheck Show box
     Save as Custom Estimate
 2. Navigate to Transactions > Sales > Prepare Estimates>
     Custom Form = Custom Estimate
     Select taxable customer and add taxable item
     No tax computes on the quote.
     Save.
 3. Click on Sales Order
     On the Address tab, change the Ship to Address to another address and then back so that the tax item populates.
     Tax computes on the sales order.