要在您的应用程序中添加和测试InApp购买，您必须就付费应用程序的苹果合同达成一致并提供您的联系信息，银行信息和税务信息。您必须登录itunesconnect.apple.com并点击合同，税务和银行业务。

For adding and testing InApp purchase in your application you have to agreed on apple contract for paid application and provide your contact info , bank info, and tax info. You have to login in itunesconnect.apple.com and click on contract, tax and banking.

提供上述信息后，您可以在itunes连接网站上看到Manage In App Purchase Button，您可以添加产品。

After providing above info you can see Manage In App Purchase Button on itunes connect web site and you can add your product.