iPhone Whether you’re logging in to a website, signing up for a service, or making a purchase, you can fill in a web form using the onscreen keyboard or have Safari fill it in for you using AutoFill.
Tired of always having to log in? When you’re asked if you want to save the password for the site, tap Yes. The next time you visit, your user name and password will be filled in for you.
Fill in a form. Tap any field to bring up the onscreen keyboard. Tap
or 
above the onscreen keyboard to move from field to field.
Fill it in automatically. Go to Settings > Safari > Passwords & Autofill and turn on Use Contact Info. Then, tap AutoFill above the onscreen keyboard when you’re filling in the form. Not all websites support AutoFill.
Enter your credit card information. Go to Settings > Safari > Passwords & Autofill and save your credit card information (or accept Safari’s offer to save it for you when you make a purchase), then look for the AutoFill Credit Card button above the onscreen keyboard whenever you’re in a credit card field. Your card’s security code isn’t stored, so you still enter that yourself. If you’re not using a passcode for iPhone, you might want to start; see Use a passcode with data protection.
Submit a form. Tap Go, Search, or the link on the webpage.