Can you claim an unborn child if you were pregnant during the year of 2018?

[rosabel_gonzalez]

My son is due March 2019

[DoninGA]

No you cannot claim an unborn child as your dependent.  The child must be born alive during the tax year to be claimed as a dependent for that tax year.  You can claim the child as your dependent on the 2019 tax return to be filed in 2020.