To participate in Amazon's 11.11 Sale by adding your products to the deals, follow these steps:

Access the Advertising Section:

Log in to your Amazon Seller Central account.

Navigate to the Advertising tab.

Navigate to Deals:

Under the Advertising tab, select Deals.

Create a New Deal:

Click on Create a New Deal.

You'll see a list of products eligible for deals.

Select Eligible Products:

Choose the products you want to include in the 11.11 Sale.

If your desired products aren't listed, check back periodically, as eligibility can change.

Submit Your Deal:

After selecting products, submit your deal for approval.

Ensure your products meet Amazon's deal criteria, such as having a minimum rating and sales history.

For more detailed information, refer to Amazon's official guidelines on creating deals.