Turbo Tax incorrectly completes 511 with filing in multiple states. 511-TX states the credit is not authorized if a tax return is filed in the other state, yet Turbo Tax processes the form anyway. Turbo Tax also populates Line 4 of the 511 with the incorrect value for out-of-state income. The 511 states out-of-state income except wages, yet Turbo Tax populates the value with wages. Turbo Tax then calculates the AGI incorrectly resulting in a lower tax burden. Result was underpayment of taxes, and an imposed penalty and interest. The issues noted above cannot be overridden and therefore e-file cannot be used. In fact, Turbo Tax printed forms cannot be used. Oklahoma 511must be completed manually and mailed if filing as resident with out-of-state wages.