1. Prepare relevant materials: business license, organization code certificate, legal representative ID card, tax registration certificate, etc. The manager of the supply chain company.

2. Apply to the IRS: The supply chain company needs to submit an application for issuing 6 invoices to the local taxation bureau.

3. Review materials: After the application is submitted, the government will review the relevant materials of the supply chain company, and the company can obtain the invoice after the approval.

4. Signing an agreement: After the approval of the tax bureau, the supply chain company needs to sign a corresponding agreement to clarify the scope and principles of invoice use.

5. Payment: The supply chain company needs to pay the invoice registration fee charged by the IRS before it can complete the invoice registration.

6. Receiving invoices: After paying the registration fee, the supply chain company can receive the corresponding invoices as required.