Hi Rishhad
Hello from a fellow Indian! Something similar happened to me. For previous financial years you’ll have to fill out some paperwork. Here is the reply from BMI.
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My sincere apologies for the delay. We investigated your inquiry. We’re not quite sure what happened with the tax information you provided but for some reason, the adjustment wasn’t completed to your tax status. My apologies for this.
You are correct; the Q1 2022, Q2 2022, Q3 2022, and Q4 2022 distributions were incorrectly taxed 30% instead of 15%.
We’ve already processed the 2023 tax reimbursement and a check has been mailed to you. For the previous 2022 tax deductions, to recover the amount over-withheld please file Form 1040-X or amended Form 1120-F, per the IRS website:
https://www.irs.gov/forms-pubs/about-form-1040-nr