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Error: 1054 unknown column shipping tax in field list [tab stop]
there were two missing entries in the store SQL for "Edit Orders" as follows:
1) Table 'orders" missing Field "shipping_tax"
2) Table 'configuration' missing entry for "Edit Orders"

Run the following script into your store SQL:

ALTER TABLE orders ADD shipping_tax DECIMAL( 7, 4 ) DEFAULT '0.000' NOT NULL ;
INSERT into configuration (configuration_id, configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) values ('', 'Order Editor- Display Payment Method dropdown?', 'DISPLAY_PAYMENT_METHOD_DROPDOWN', 'true', 'Display Payment Method in Order Editor as dropdown menu (true) or as input field (false)', '1', '21', NULL, '2006-04-02 11:51:01', NULL, 'tep_cfg_select_option(array(\'true\', \'false\'),');