How does one itemize on the Federal and then take the standard on Missouri? Although it's perfectly legal in most cases, Turbotax Deluxe doesn't seem to allow for it?

[ChristieB]

If you are required to itemize on your Federal return, or if Itemized Deductions on your Missouri return will bring you a larger tax benefit than the Standard Deduction, TurboTax will automatically use Itemized Deductions for your Missouri return.

The Standard Deduction amounts for Missouri are as follows: 

Single or Married Filing Separate - $12,000

Head of Household - $18,000

Married Filing Combined or Qualifying Widow(er) - $24,000

Itemized Deductions: If you itemized on your federal return, you may want to itemize on your Missouri return or take the standard deduction, whichever results in a higher deduction. If you were required to itemize on your federal return, you must itemize on your Missouri return.

https://dor.mo.gov/forms/MO-1040%20Instructions_2018.pdf