Per IRS Publication 5187, page 3:

What's New?

Under the Tax Cuts and Jobs Act, passed December 22, 2017, the amount of the individual shared responsibility payment is reduced to zero for months beginning after December 31, 2018.

Beginning in tax year 2019, Form 1040 will not have the "full-year health care coverage or exempt" box and Form 8965, Health Coverage Exemptions, will no longer be used.

You need not make a shared responsibility payment or file Form 8965, Health Coverage Exemptions, with your tax return if you don’t have minimum essential coverage for part or all of 2019.