The negative amount is a credit. If you have questions about your account, call the IRS. TurboTax does not have access to your IRS account. Call 1-800-829-1040. Be aware. The phone lines are backed up. The IRS opens at 7 a.m. local time in every time zone. The earlier you call, the better your chance of speaking with someone.
You can also make and view payments with an IRS online account.
For more info see Your Online Account.