On a tax return you only report the payments that you made for year of the tax return. So any payments you made in 2018 will be reported on the 2018 tax return. Any payments you made in 2019 will be reported on the 2019 tax return.
The same works for reporting property tax payments. If the taxes were due in 2017 but were not paid until 2018 then that payment would only be reported on the 2018 tax return. It would NOT be entered on a 2017 tax return since the payment was made in 2018.