Provided that, nothing in this section shall apply to a proprietor who is in receipt of a fixed amount as a lump sum under section 7.

Assessment of tax Assessment of tax.—

1. (1) If the prescribed officer is satisfied that the returns submitted by a proprietor are correct and complete, he shall assess the amount of tax due on the basis of such returns.
2. (2) If the prescribed officer is not satisfied that the returns submitted by a proprietor are correct and complete and he thinks it necessary to require the presence of the proprietor or the production of further evidence, he shall serve on such proprietor in the prescribed manner a notice requiring him, on a date and at a place specified therein, either to attend and produce or cause to be produced all evidence on which such proprietor relies or to produce such evidence as is specified in the notice.
3. (3) On the day specified in the notice or as soon afterwards as may be, the prescribed officer shall, after hearing such evidence as the proprietor may produce and such other evidence as the prescribed officer may require on specified points, assess the amount of the tax due from the proprietor.
4. (4) If a proprietor fails to submit the returns or fails to comply with all the terms of a notice issued under sub-section (2), the prescribed officer shall assess to the best of his judgment the amount of the tax due from the proprietor.
5. (5) If a proprietor fails to pay the amount of tax due under this Act within the prescribed time, the prescribed officer may assess the amount of tax due from the proprietor after giving him an opportunity of being heard.