How do I delete 1095 A health insurance form. I have 1095 B?

Go back to the section Federal>>Deductions and Credits>>Medical>>Affordable Care Act (Form 1095-A).  The first question in that section is "Did you receive Form 1095-A for your health insurance plan?".  Change your answer to No.

If a 1095-A form is still causing errors, use the "Delete a Form" feature to delete any 1095-A form installment sales form in TurboTax Online:

1. Open or continue your return in TurboTax.
2. In the left menu, select the dropdown arrow next to Tax Tools and then underneath that Tools.
3. In the pop-up window Tool Center, choose Delete a form.
4. Scroll down the page and look for 1095-A.  
5. Select Delete next to the 1095-A you want to delete and confirm the deletion.

Click here for the full article on deleting a form in TurboTax.