If you have a retirement plan work and are over a certain income then your deduction is limited automatically. Please see IRA deduction limits for more details. It seems you are in the phaseout range where you can get a partial deduction. So part of your contribution is already automatically nondeductible ($280).
If you are performing a backdoor Roth then you correctly selected to make the rest nondeductible.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
