What happened to Schedule 4?

Beginning in tax year 2019, Schedule 4 will be combined with Schedule 2 and reported on the new Schedule 2. 

Part II of Schedule 2 Other Taxes now makes up what was the old Schedule 4 entries for tax year 2018.  This will include the items in Part II of Schedule 2 on lines 4-9.  The newly revised Schedule 2 will be attached to the 1040 Form or the new 1040-SR Form if entries are made on Schedule 2.