To file as a resident alien, you would need to be in the US for 183 days in 2024 to qualify for the substantial presence test. Here are the terms of the test.
- 31 days during the current year, and
- 183 days during the 3-year period that includes the current year and the 2 years immediately before that, counting:
- All the days you were present in the current year, and
- 1/3 of the days you were present in the first year before the current year, and
- 1/6 of the days you were present in the second year before the current year.
This means to satisfy the 183 day requirement it's 31 days in 2024 plus 1/3 days if you were present in 2023, and plus days if you were present in 2022. However if you spent 183 days in 2024, this would satisfy the terms of the substantial presence test.
If you weren't in the US for 183 days last year, you would need to file with Sprint Tax.
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