I filed my Income Tax Return (ITR) for AY 2025–26 under the old tax regime. Recently, I received a notice from the Income Tax Department asking me to submit supporting documents for a deduction claimed under Section 80C. Unfortunately, I am unable to locate the required documents.
I would like to know whether I can now file a revised return and switch from the old tax regime to the new tax regime. My total annual income for AY 2025–26 was approximately ₹6 lakh, and under the new tax regime I would not have any tax liability.
Is it permissible to change the tax regime by filing a revised return in this situation? If not, what are my available options?