+=head2 wa_sales_update_tax_table_sanity_check
+
+There should be no duplicate tax table entries in the tax table,
+with the same district value, within a tax class, where source=wa_sales.
+
+If there are, custome taxes may have been user-entered in the
+freeside UI, and incorrectly labelled as source=wa_sales. Or, the
+dupe record may have been created by issues with older wa_sales code.
+
+If these dupes exist, the sysadmin must solve the problem by hand
+with the freeeside-wa-tax-table-resolve script
+
+Returns 1 unless problem sales tax entries are detected
+
+=cut
+
+sub wa_sales_update_tax_table_sanity_check {
+ FS::cust_main_county->find_wa_tax_dupes ? 0 : 1;
+}
+