You can preview your Schedule 3 within TurboTax by taking the following steps
1.) On the left-hand side of your screen, click Tax Tools
2.) Click Tools
3.) On the window that pops up, click View Tax Summary
4.) On the left-hand side of your screen, click Preview My 1040
If you scroll down towards the bottom you will see a section labeled Schedule 3. Are there any values here?
If you started entering information for the Child and Dependent Care Credit, this can sometimes cause this issue. If you click on Tax Tools -> Tools -> Delete a Form, do you have Form 2441 included with your Federal forms?
If so, and you are not claiming any child and dependent care expenses, you can delete this information from TurboTax using the FAQ below:
If this is not the case, please provide additional details below.