How to release iOS app to TestFlight

Steps

1. Open your project on Xcode
2. Go preference and select Accounts and sign with Apple id

3. Under the Project — Targets -> General ; Update the identity details such as Version, Build

4. Then Select Device; Generic iOS Device

5. Then click Archive under product.

6. Open Organizer under Windows to check status of Archiving

7. Then Validate app — Follow steps by clicking Next button

8. Distribute app — Follow steps by clicking Next button, then it will be uploaded to App Store Connect.

8. Open App Store Connect and Login (there will have app is processing state in Activities Section)
https://appstoreconnect.apple.com/login

9. After processes complete go to TestFlight tab and click on build app and update missing compliance(Click No)

10. Then fill the test details and add testers to app build.