"I needed to copy the total assets amount from line 14, column b to line 21, column b."
No, you should not need to do this to balance. You need to figure out what is missing -- either an asset or liability that is not accounted for. Sometimes overriding the Net Income (loss) per Books will be helpful with your own calculation will be helpful as it is unclear how TurboTax arrives at this number on the "Reconciliation" form.
