In terms of Section 93(1) of the CGST Act, 2017, after the death of the taxable person, the tax, interest or penalty remaining unpaid either determined before the death or otherwise, shall be recovered in the following manner:
1. if a business carried on by the person is continued after his death by his legal representative or any other person, such legal representative or other person, shall be liable to pay tax, interest or penalty due from such person under this Act; and
2. if the business carried on by the person is discontinued, whether before or after his death, his legal representative shall be liable to pay, out of the estate of the deceased, to the extent to which the estate is capable of meeting the charge, the tax, interest or penalty due from such person under this Act.
(ICAI FAQ PUBLICATIONS 06-09-2017 Special provisions regarding liability to pay tax, interest or penalty in certain cases: FAQ NO. 15)