How do I apportion partnership income between two states?
I am trying to understand how to apportion partnership income between two states after moving from one state to another. Last year I moved from MA to AZ and I also moved the partnership business to AZ. All the income comes from an online business and it is not tied to a specific state. I would like to use the "Sales Factor Only" apportionment method but it is not clear to me how to account for the sales in the month I moved. I moved in the middle of March and I am wondering how I should split the income for this month between the two states?