Home office expenses: how do show 2 offices used at different times of the year, NOT simultaneously?

Home business: I used home office #1 for 9 months, moved to a new home, then used home office #2 for the remaining 3 months out of the year (90% each), however TurboTax won't let me enter both offices not to exceed a total of 100%.  I'm stuck. How do I advance in the program?