Worksheet for Determining Support - College Student Living Away from Home

Hi, I am a resident of State A and full-time undergrad student in State B.

 

As such, I live in B for 9 months a year as a full time student (intending to return to my home of A, making these 9 months living in B for "temporary or transitory purposes" as well as working an internship in B during the summer.

 

I was wondering how the "Expenses for Entire Household (where the person you supported lived)" would be calculated, since I am only physically at home for no more than 1 month per year (during school breaks, etc.).

 

I pay room and board during the school year through a 529 plan (which should end up on line 15) and pay rent during the summer for my internship.

 

How should I go about filling out the worksheet correctly to avoid "double-counting" costs? I want to make sure the actual amount spent on support is correct, and not overestimated.