To use UPS Red Order to send goods to Amazon warehouse, you can follow the steps below:

Contact UPS Sales Representative: Contact UPS Sales Representative and tell them that you want to use UPS Red Order to send goods to Amazon warehouse. They can provide you with the required documents and information and provide you with UPS Red Order account and password.

Create UPS Red Order Account: Create a UPS Red Order Account on the UPS website. You need to provide some personal information and company information so that UPS can verify your identity and provide you with services.

Print UPS Red Order Label: Log in to the UPS website with UPS Red Order account and password, and then print out the required UPS Red Order Label. Each label has a unique tracking number for tracking the entire transportation process of the goods.

Label: Attach the printed UPS Red Order label to the goods to be sent to the Amazon warehouse. The label should be clearly visible and contain all the necessary information, such as the recipient's address, phone number, description of the goods, etc.

Submit the shipment: Submit the goods to UPS for transportation. You can submit the shipment through the UPS website or by phone. When submitting, you need to provide detailed information about the goods, such as weight, size, destination, etc.

Track the shipment: Use your UPS red bill account and password to log in to the UPS website to track the transportation of the goods in real time. You can view detailed information about the goods, such as shipping status, estimated arrival time, etc.

Confirm receipt: When the goods arrive at the Amazon warehouse, you need to confirm receipt. You can confirm receipt on the Amazon Seller Center or on the UPS website. After confirmation, you can print the shipping label on the Amazon Seller Center and stick it on the outer packaging of the goods. Then, hand the goods over to the Amazon warehouse staff.

The above are the basic steps to use UPS red bills to ship to Amazon warehouses. During the operation, if you have any questions or concerns, you can always contact a UPS sales representative or Amazon seller support team for help.