Tax returns can be amended in order to increase your refund for three years from the filing deadline---so if necessary you can amend as far back as three years. No one at TurboTax can look at your past tax returns. You should seek local paid tax help to go over your returns to see if you should amend.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
