There are two splits involved: One for the 30% portion of the house and one for the 44 days. The program can NOT do both splits, so you need to manually do some calculations.
I think I would treat the 30% as a separate property. Don't say you rented part of you home, tell the program it is a completely separate property. You manually calculate the first split, and will enter 30% of all of your shared expenses (mortgage, taxes, insurance, utilities, etc.). Then enter the 44 days and the number of your personal days, and the program will do the second split.
