Does Turbotax automatically change a wrong assumption? My 23 year old son is not in school and answered TT that he would be claimed on someone else's tax return.

[Anonymous]

TT assumes very little - just that the answers and entries are correct unless there's an inconsistency in the return, it's all based on taxpayers entries.  TT does not have the ability to cross check betwwen returns.  

since he's not in school and over 19 he would not be a qualifying child but could be a qualifying relative if all these tests are met

1 - his gross income for 2019 less than $4,200
 2 - you provide over ½ his support
3 - isn’t a qualifying child of another taxpayer