Please clarify if the explanation below does not move you forward. While you are in the Schedule C activity you can use the Continue button to keep moving forward.
You can also use the Search (upper right) to type schedule C and then click the Jump to.. link to go back to the summary screen to edit your business schedule and then finish the areas of your Schedule C that are not yet complete.
It is important to continue through your business activity to the end to make sure you have all the information in place that should be there (income, expenses, depreciation of assets, etc.) so that TurboTax knows what should be included in all the calculations.
Please update with more details and we will provide more direct guidance.