In case, a deductor (employer or organisation) does not pay the TDS amount to the Income Tax department, the TDS will not be credited against your PAN in your Form 26AS. Moreover, you would not be able to take a tax credit of the TDS, at the time of filing your income tax return. If you choose to take the tax credit for the unpaid TDS amount, you will receive a notice from the income tax department, informing about the mismatch in the taxes paid and TDS claimed.