Deductions & credits

No, TurboTax doesn't actually deduct a portion of the bond premium expense to calculate an amount to add back to Virginia State income.  To get the bond to show as nontaxable by the state, entering the tax exempt interest in Box 8 of the 1099-INT  will confirm the payer's EIN, which will carry over until you can enter the sate from which the municipal bond came.  The state has to be the sate you live in for it to be non-taxable.