AutoFill can be enabled on an iPhone or iPad running iOS to save and update personal details, which will then be automatically entered into forms as and when needed.
To enable AutoFill open Settings, then select Safari, and then AutoFill, ensuring Use Contact Info is toggled on.
To check that the information is accurate, tap My Info and select your contact name from the list.
To add or update your personal details, open the Contacts app, find your contact name, tap Edit, go through the available options and ensure everything you want AutoFill to use is listed, then tap Done.
Credit card info can also be added to AutoFill, and this can be accessed and edited through Settings > Safari > AutoFill > Saved Credit Cards.
Activated for passwords in Settings > Apps > Passwords > View AutoFill Settings, then making sure the AutoFill Passwords and Passkeys toggle is enabled, and the AutoFill From option is set to Passwords.
To edit saved passwords, go to Settings > Apps > Passwords > Open Passwords, then select All and the password you want to edit, Edit, Change Password, and Save.