Now i am in beta virsion 14.0 and I want to change iOS 13.6 version
How can I change from beta version to iOS 13.6
Remove the public beta by deleting the beta profile
Go to Settings > General, and tap Profiles & Device Management. Tap the iOS Beta Software Profile. Tap Remove Profile, then restart your device.
How to uninstall iOS beta software - Apple Support
This is not the right forum to discuss beta
When you experience an issue or something does not work as expected on beta, send your feedback directly to Apple with Feedback Assistant.