If your parents had 20% tax deducted on dividends because they didn't submit PAN details, they might be able to claim a refund by filing a revised return. This needs to be done by 31 May 2021. However, the tax credit will only be successful if the company corrects their TDS return to include the PAN and the deducted tax.
My father and mother had not submitted their respective pan card details with the company and hence 20% tax was deducted from dividend directly by company in August 2020. Now I understand that they can still claim an appropriate refund of tax deducted at higher rate from the department by filing revised return. Can this be done by 31 May 2021.
27 May 2021
That's possible but the TDS credit shall be successful only when the company corrects their TDS return and reports the PAN in their return along with 20% tax. Otherwise the amount is gone.