In historical periods, Temporary Differences (v3120.00) is entered as a tax rate. The rate should be such that Deferred Provision for Income Taxes (v1160.00) divided by it equals the temporary differences in that period.
v3100.00 - v2190.01 + v3110.00
If multiple temporary differences exist, you can subaccount Other Temporary Differences (v3110.00), so subaccounts represent a unique temporary difference. You can model each subaccount using a forecast method that best predicts what happens during the forecast periods.