Turbo tax is not allowing me to add my 3rd child as a dependant, saying that the information is invalid but it is all correct, particularily his SIN. Please help?

[steveburton132]

When adding dependants, the first 2 children are added ok, but the 3rd child it says that the information is invalid and highlights his SIN. Ive double checked this info.

[TonyC11]

You should be able to add the child dependant without entering their SIN, if indeed they have one. The SIN would only become necessary if the dependant was filing their own return.