My healthy child passed away in 2017 due to an accident. I had full custody of her and have claimed her on all my taxes. How long can I continue to claim her on my taxes?
So sorry for you loss.
No you cannot claim your child as a dependent on the 2018 tax return since they passed away in 2017. The child could only have been claimed as a dependent on the 2017 tax return in the year of passing.