Search:
Does Tesoro accept unsolicited supplier requests?
Who do I contact with questions?
How do I update my Supplier Information?
What is Tesoro’s supplier diversity policy?
Questions related to your 1099?
How do I get started with EDI?
How do I get started with Supplier Self Service?
Does Tesoro accept unsolicited supplier requests?
Tesoro does not accept any unsolicited proposals or requests.
Please refer to the Contact Information or the Invoicing Methods page. Invoice addresses and fax numbers vary depending on the type of supplier. The Invoicing Methods page provides the required details.
Who do I contact with questions?
Please refer to the Contact Information page for telephone numbers and e-mail addresses.
How do I update my Supplier Information?
Updates or additions to supplier information can be submitted via e-mail to MasterData@tsocorp.com or faxed to (210) 579-4575.
What is Tesoro’s supplier diversity policy?
Tesoro strives to do business with suppliers who have been classified and certified as small business enterprises and diversity businesses, including those owned and operated by people who are minorities, women, veterans, physically challenged and/or disadvantaged.
Questions related to your 1099?
Tesoro will issue IRS Form 1099-Misc to reportable suppliers each year. If you have questions concerning your 1099-Misc Form, or have not received a 1099-Misc form for goods and services sold to Tesoro, please refer to the Supplier Information Forms page for contact details and the required form to be completed.
How do I get started with EDI?
Tesoro is currently in the development phase of implementing EDI for our refinery MRO Suppliers. We will be working with our strategic suppliers to implement EDI. If you would like to participate in the program please contact your local Tesoro purchasing contact for additional information.
How do I get started with Supplier Self Service?
Our Supplier Self Service Portal is currently under development. Once the TSO Supplier Self Service Portal is completed, you will be able to register for access to the portal using this website. We will update this website as soon as the Portal becomes available to our Suppliers.