This is not what I entered on my 1095 A. It has picked up other values. Can I redo Form 8962 ?

You can delete your entries for your 1095-A and the forms and enter them again.  

Follow the steps below to delete your entry for Form 1095-A:

1. Open TurboTax
2. Select Deductions & Credits
3. Scroll down to Medical and select Start/Revisit next to Affordable Care Act (Form 1095-A)
4. Select the garbage can to delete Form 1095-A

Next, make sure that Forms 1095-A and 8962 are deleted from your tax return. Follow the instructions below.

1. Select TaxTools in the menu 
2. Select Tools
3. Select Delete a Form in the pop-up window
4. Scroll down until you see Form 1095-A. Also check for Form 8962 and delete both.

Review the TurboTax Help article: How do I view and delete forms in TurboTax Online? for more information.

Now you can enter your Form 1095-A again, which will create a new Form 8962.

Follow the instructions in the TurboTax article Where do I enter my 1095-A? to start over with your Form 1095-A.