+ <li>taxclass
+ <li>exempt_amount
+ <li>taxname - if defined, printed on invoices instead of "Tax"
+ <li>setuptax - if 'Y', this tax does not apply to setup fees
+ <li>recurtax - if 'Y', this tax does not apply to recurring fees
+ </ul>
+ <li><a name="cust_tax_exempt" href="man/FS/cust_tax_exempt.html">cust_tax_exempt</a> - Tax exemption record
+ <ul>
+ <li>exemptnum - primary key
+ <li>taxnum - <a href="#cust_main_county">tax rate</a>
+ <li>year
+ <li>month
+ <li>amount