Deductions & credits

I created the federal standard deduction and need to itemize for ms itemized deductions (allowed) but it reverts to standard deductions only for both.  I saw the footnote instructing to go back to the federal form and enter the allowed mortgage interest, taxes, etc, which said it would update the state. it did not. i chatted online with a turbotax 12 tax expert who said turbotax will not allow it. She said the system will not allow standard on federal and itemized on state (even though ms allows it.) so confused. So I need to file federal via efile, wait for it to be accepted and then redo my state return? How can this be? Thanks.