How do I change the federal schedule c, line 31 for my spouse? There is an amount that is incorrect.

Line 31 of Schedule C is your net profit.  To make any changes to this line, you will need to review all of the entries you made to your business' income and expenses.  

 

To go back to the Schedule C on TurboTax:

 

1. Open your return
2. Go to Schedule C
3. Answer Yes to Did you have any self-employment income or expenses?

Here's some information you may find helpful:

 

A Guide to Self-Employment Taxes for Contractors, Freelancers, and Beyond