I can't select grandson for my dependent. Only option is son or daughter

[ddurst3000]

I'm reviewing my form and it has son, but it's my grandson. Should I still file with that error.

[xmasbaby0]

To claim a grandchild as your dependent

When you enter the child’s name in Personal Info, you will be asked “What’s your relationship to  [child’s name]?”  

           Choose “another person”

            a drop down menu will appear that lets you choose grandchild