Amrita® Aromatherapy, Inc. If applicable, please also fill out a W-9 form and the Iowa Sales Tax Exemption Certificate and mail, fax, or email the completed form to Amrita®: Mailing Address: Amrita ® Aromatherapy, Inc. 1900-C West Stone Avenue, Fairfield, IA 52556. orders@amrita. 641-472-8672.Web