You can view the Detailed Tax Summary page of each return. Which is found under the Review Section – Bottom Line – then Detailed Tax Summary.
Add lines 244 to 256 to get line 257 amount. Not sure, which schedule you are referring to when you mention lines 3-18. If you are referring to line 318 of Schedule 1, this is the disability amount transferred from a dependent and that can be found in the DTS.