Changing/adding your reseller tax ID certificate is easy on AuctionNinja. You may update your information at any time by logging onto AuctionNinja.com. Click on MY DASHBOARD. Then click on ACCOUNT. Click on PREFERENCES. Check the box next to TAX INFORMATION. Enter your TAX ID # and be sure to upload a copy of the certificate.
***IMPORTANT: You must include a copy of the certificate in order for your Tax ID to be valid. Providing your Tax ID number only is not enough. It must be accompanied by the certificate. Contact and address information must also match the information on the certificate.***