Addison Co. has one temporary difference at the beginning of 2017 of $500,000. The deferred tax liability established for this amount is $150,000, based on a tax rate of 30%. The temporary difference will provide the following taxable amounts: $100,000 in 2018, $200,000 in 2019, and $200,000 in 2020. If a new tax rate for 2020 of 20% is enacted into law at the end of 2017, what is the journal entry necessary in 2017 (if any) to adjust deferred taxes?