"not sure if there is a way to validate it."
look for an amount on the Schedule 1 IRA deduction line.
You can always convert any amount you want.
If you convert a deductible amount, your tax break (deduction) will compensate for the taxable amount on the conversion.
If your IRA is previously funded with deducted contributions, it is not possible to convert only your recent non-deductible contribution.
@veyron
