You have the ability to remove the tax ID from populating on patient statements if you would like. To change this setting, please follow these steps and see screen shot below.
1) Administration> General
2) Practice Preferences> Click the ‘Additional Preferences’ tab
3) Click ‘Edit’ in the bottom right corner. On this screen, find ‘Accounting’
4) Click the ‘No’ option and then click ‘update’ in the bottom right corner