i want to change this years return by not contributing to an IRA

[ColeenD3]

That is your choice. If you have already entered the contribution and want to remove it, you can delete the form.

To Delete a Form

Open your return in TurboTax. 

In the left side bar, select Tax Tools> Tools.

In the pop-up window Tool Center, choose Delete a form.

Select Delete next to the form/schedule/worksheet and follow the onscreen instructions