After you file

I’ve tripled checked everything and everything was correct. My return is very simple so I didn’t make any mistakes. I’ve been doing it the same for years and never had an issue until now. My stimulus payments were all messed up and now my 2020 return is going to be delayed. Could TurboTax have made an error? Why wouldn’t I get a child tax credit for all three of my kids? They are 1, 5 and 7 and don’t live with anyone else. There’s no explanation other than the system messed up.