If you owe federal taxes you can't pay, you should select in turbotax "I will pay by mail" so you can file, then apply for a payment plan directly on the IRS web site. Applying for a payment plan has a non-refundable fee, which is lower if you use the IRS web site directly and higher if you apply through Turbotax. You also can sometimes get an answer immediately on the IRS web site instead of waiting for a confirmation letter.
https://www.irs.gov/payments/payment-plans-installment-agreements
https://www.irs.gov/payments/online-payment-agreement-application
