For the Arizona tax credit for paying taxes in another state what numbers from the other state do I need and where can I find them?

[DanielV01]

You need to know the income amount that is being taxed in the other state and the tax liability in that state.  If the income is reported on a W2, the amount of income to the other state is reported right on the W2.  The tax liability, however, is not the tax withheld, but rather the tax liability minus any refund from that state or in addition to any additional tax you must pay in.  TurboTax recommends you to prepare the other state return first in order for the credit to transfer over to the Arizona return.