For the past 3 years I have made after-tax contributions to my ROTH IRA. Last year I had to take a $4500 disbursement. That lowered my refund by $2300. Is that right?

According to TurboTax, the penalty on the distribution is ~$450, but my refund went down $2300. Not sure why this would happen, since the contributions are all after-tax. Am I just claiming the distribution incorrectly?