Iowa Filing Status 4 - Married Filing Seperate Return. How to create two state returns for Iowa (Self/Spouse)?

Filing Married Filing Jointly return for Federal.  For Iowa, it's better (less state tax) to file using Filing Status 4 (Married Filing Separate Returns).  When selecting Filing Status 4 on the Iowa return, TurboTax creates a (mostly) accurate return for Self.  How do you create a second Iowa return for the Spouse (using the same Federal MFJ return)?