I think I'm showing double for health insurance deductions. Self employed - entered premiums on business expenses. Completed health Insurance section

In your case, I recommend viewing the forms to see where your numbers flowed. Then you can determine if there were any double entries. 

Here's how to preview/print/review your returns:

1. Open or continue your return.
2. Select Tax Tools in the left menu (if you don't see this, select the menu icon in the upper-left corner).
3. With the Tax Tools menu open, you can then:

• Select Print Center and then Print, Save, or Preview This Year's Return to preview your entire return, including all forms and worksheets (you may be asked to register or pay first).

• If you want to see all the worksheets, also select the option to include government and TurboTax worksheets, then select View or print forms. This will allow you to print your complete tax file.

• View only your 1040 form by selecting Tools. Next, select View Tax Summary in the pop-up, then Preview my 1040 in the left menu.

If you had health insurance through the Healthcare Marketplace and received a 1095-A, you ONLY check the self employed box after entering the 1095-A.  Do NOT enter the insurance in the business section (that screen specifically tells you not to enter 1095-A insurance on that screen).  If you did enter it there, go back and delete it