You can add a box to the W-2 using Enhanced Tax Reporting in Sage BusinessWorks by inserting a column and adding the Box ID.
Resolution
PR, Taxes, Print W-2s. Once you’ve progressed through the Enhanced Tax Reporting W-2 setup, a grid will appear. This grid lists your employees and their totals.
Right-click the heading and select Insert Column.
Enter the Box ID in the New Column Name. For example, Box 14.
Leave Default Value: blank.
Click OK.
The column appears on the grid. The Heading will become yellow with a drop-down arrow.