Unearned income is allocated to your state of residence at the time you received it. See this: https://ttlc.intuit.com/community/income/help/how-do-i-allocate-split-income-for-a-part-year-state-r...
As long as the results are correct, the allocation method you use shouldn't matter.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
