My 1095-A number is said to be duplicate

You can try deleting the number and re-entering it. Don't include any punctuation marks. 

You could also try deleting your Form 1095-A and re-entering it. 

To delete Form 1095-A, you can do the following if you are using TurboTax Desktop:

1. Click on "Forms" at the top right of your TurboTax screen to switch to "Forms Mode"
2. In your left panel search for "Form 1095-A"
3. Click on "Form 1095-A" and it will appear in your right panel
4. At the bottom left of your "Form 1095-A" click on Delete Form
5. A box will appear to confirm the deletion, Select "Yes"

If you are using TurboTax Online you can:

1. Continue your return
2. Choose "Tax Tools" option on the left menu bar in the federal section of TurboTax
3. Choose "Tools"
4. Under "Other Helpful Links" choose "Delete a form"
5. Find the Form 1095-A and click on the option to delete it

Here's how to enter your 1095-A in TurboTax:

1. Open your return.
2. Click on the search icon at the top right of your screen.
3. Type "1095-A" in the search box
4. Click on the link "Jump to 1095-A"
5. Answer "yes" to "Did you receive Form 1095-A for your health insurance plan?
6. Select "Continue"
7. Enter your information on the screen "Let's get the info from your 1095-A Form"

NOTE: You should leave the boxes blank. Do not enter a zero in the boxes when entering your Form 1095-A.

Your TurboTax screens will look something like this:

Click here for "Where do I enter my 1095-A?"

Click here for additional information on Form 1095-A Health Insurance Marketplace Statement.

Click here for additional information on the Premium Tax Credit