To make the Android’s default browser or Chrome, automatically fill in websites forms for you, run the browser and then do the followings:
1: Go to Browser’s settings
2: On the General section, activate Form Autofill
3: Go to Autofill Data section
4: Fill in each of the following fields: Name, Company name, Address, City and state, City Code, Country, Phone Number, Email, etc.
5: After done, tap Save Profile
Now whenever needed, the browser automatically fills in these fields for you, as soon as you start filling the form.
Update: Here is where you can find the Auto fill option on Chrome for Android: