Schedule 4 is a new form introduced by the IRS as part of the 2018 tax reform that reports Other Taxes, such as Self-Employment Taxes and the Health Care Individual Shared Responsibility Payment.
I have attached a screenshot below of Schedule 4 so that you can see what all is included. Any of these items would require the Schedule 4 to properly report and would mean, unfortunately, that it cannot be deleted from your return in TurboTax. These amounts are added up and then transferred to Form 1040, line 14.
If you'd like to view your Form 1040 to see how this schedule will impact your return, please follow the steps below:
When logged in to TurboTax online:
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
Scroll down to reach line 14, Other Taxes