There is no more "long" form, just Form 1040 with schedules added as needed. However, if you're referring to "itemizing" instead of taking the standard deduction, then you should itemize as long as it makes financial sense to you (i.e., helps you financially).
As a result of these and other tax law changes, our estimate is
that nearly 90% of tax filers will now be taking the higher standard deduction,
up from around 70% last year. And if you're in the 90% group, you won't see a
change in your refund after entering your mortgage interest and property taxes.
The 2018 standard deduction is nearly double the 2017 amount:
$12,000 for Single
Add $1,600 if 65 or older
Add $1,600 if blind
$18,000 for Head of Household
Add $1,600 if 65 or older
Add $1,600 if blind
$24,000 for Married Filing Jointly or Surviving Spouses
Add $1,300 for each spouse 65 or older
Add $1,300 for each blind spouse
$12,000 for Married Filing Separately
Add $1,300 if 65 or older