Turbo Tax isn't holding the returns.  The IRS is

Refund timing for PATH act, EIC and Additional Child Tax Credit

https://www.irs.gov/individuals/refund-timing

TurboTax does not hold tax refunds.

By Law the IRS holds tax refunds until mid-February that include EIC and/or ACTC - https://www.irs.gov/individuals/refund-timing