In app purchase, testing using sandbox

Question

Can I still test in app purchase using sandbox with the following warning?

Note: You do not currently have a iOS Paid Apps contract in effect. If this In-App Purchase was submitted with your app, then your app will not be available on the App Store until your contract goes into effect. Legal, Admin, and Finance users can go to the Contracts, Tax, and Banking module in iTunes Connect to view your contract status.

Answer 1

When adding and testing in-app purchase in your application you have to have a contract for paid application and provide your contact info , bank info, and tax info.

It's not possible to test without it.