J-1 Research Scholar – Resident or Nonresident for 2025 after previous stay?

Hello,

I am a J-1 Research Scholar and I have a residency determination question.

My travel history:

  • First stay: Aug 26, 2018 – Jul 12, 2020 (J-1)

  • Outside US: 2021–2022

  • Second stay: Sep 8, 2023 – present (J-1)

I was treated as a resident for tax purposes in 2020 and 2024.
For 2025, Sprintax classifies me as a nonresident, but I believe the “2-out-of-6 year rule” for J-1 researchers may make me a resident under the Substantial Presence Test.

Should I file Form 1040 or Form 1040-NR for tax year 2025?

Thank you.