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.