Final answer:
Trio Company would adjust its deferred tax liability from $120 to $140 due to the increase in the income tax rate from 30% to 35%, resulting in a $20 increase in liability.
Step-by-step explanation:
If Congress increases the income tax rate from 30% to 35%, Trio Company will need to adjust its deferred tax liability. Initially, Trio's deferred tax liability was based on the future taxable amount of $400 at a tax rate of 30%, resulting in a deferred tax liability of $120. With the new tax rate of 35%, the deferred tax liability on the same future taxable amount of $400 would be $140 ($400 x 35%).
Therefore, Trio will record an increase in the deferred tax liability by $20 ($140 - $120).
These changes reflect the principle that deferred tax liabilities should be measured based on the tax rates expected to apply in the periods when the liabilities are settled, which is consistent with generally accepted accounting principles (GAAP).