Where do I enter MN tax-exempt interest of Federal Securities on MN Tax form??

I got recently a consolidated Tax form from Vanguard which gives information on Federal Securities exempt from State Tax but not Federal Tax. I use TurboTax Deluxe with MN state software. I cannot enter this on No: 12 as these are not Federally exempt. Advice on how and where I can enter these numbers to get MN Tax benefits. Thanks.