You can help narrow down which Line on your Schedule 4 has values in it 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 of this page, your Schedule 4 will be there for you to view. If there are accidental entries, this will also help narrow down which area to revisit within TurboTax.