(cust_main.tax = 'Y').
=item exempt_cust_taxname - flag indicating that the customer is exempt
-from the tax with this name (see L<FS::cust_main_exemption).
+from the tax with this name (see L<FS::cust_main_exemption>).
=item exempt_setup, exempt_recur: flag indicating that the package's setup
or recurring fee is not taxable (part_pkg.setuptax and part_pkg.recurtax).