Hi. Do you have the programming manuals for these models? If not, we can check that they have been setup correctly for tax previously as tax is disabled by default.
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If anyone needs / looking for manuals for these cash registers, go here:
XE-A102
http://the-checkout-tech.com/manuals/cashregisters/Sharp10.php
ER-A420
http://the-checkout-tech.com/manuals/cashregisters/Sharp5.php
Registerman, July 2010
