Remove the brackets.
Select iv.*,pt.pty_name,cm.commodity,it.itm_description,cy.company_name from invoicetbl iv left join partytbl pt on iv.pty_code=pt.pty_code left join commodity cm on iv.commodity_id=cm.commodity_id left join itemtbl it on iv.itm_code=it.itm_code left join companytbl cy on ...