Sales Tax Exemption

• ★ I am with a tax-exempt organization and would like to place an order without being charged sales tax. What steps should I follow?
• ★ The sales tax rate for the State of Illinois is 6.25%. Why was I charged with 10.25% sales tax rate?
• ★ Why wasn't my exemption certificate accepted?
• How do I place an order in the name of a company that is registered with a VAT ID within the EU?
• Which exemption certificate is the most applicable for my organization since I resell in multiple states?
• How can I be tax exempted and/or receive a sales tax reimbursement in Canada?