Where is page 2?

The *new* Form 1040 does not have a page 2.

Starting in 2018, everyone uses the same Form 1040, which also includes new Schedules 1 thru 6.

Where is income entered?

Some income is entered directly on Page 1 of Form 1040 and other types are carried over from other schedules (Schedule 1, C, B, D, etc) onto Page 1 of Form 1040.  What type of income are you looking to find on your return?

All of it.