It would be best to wait a few weeks to see if you receive the request from the IRS for the form 8962. You can mail it in by itself, but it may not be a matched to your return properly.
If you don't receive a letter after a few weeks and your tax payment is processed or you have received your refund, you can prepare an amended return in TurboTax to include the form 1095-A information and you can mail that in if there was a change in your tax.