Line 25700 is the total of all the amounts on lines 24400 to 25600. If there are no entries in those lines, there is no need to enter anything in line 25700.

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t1 line 25700- what does it include?

? 2- when I include an adult as a dependent, do we need to fill out her own return, or is she included on mine?

1- As seen in the image below in line 25700 you have to enter the amount after adding all the amount from line 24400 to line 25600.

2- When you claim and eligible dependant, the dependant also files their own return with their information. 

For further information, please see our TurboTax article: Who are Considered Dependants?

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