I realized when doing taxes this year that i made a mistake entering my health premium last year. i think i am owed money. what can i do?

[KittyM]

You can calculate an amended return and if you are due a refund, you can file it and get the money the IRS owes you.  It's free if you used TurboTax to file your original return.

Here's how to Amend My Return in TurboTax.