You don't need to worry about this. Tax Reform has caused several tax forms, you've been familiar with in the past, to either be revised or omitted. It also added additional forms and schedules. The estimated payments you made are not listed on line 66 of the new Schedule 5 "Other Payments and Refundable Credits". That amount is now combined with any other tax payments you made and Federal withholding and reported on line 18 of Form 1040.
