| 21AB Certificate for claiming relief under an agreement referred to in section 90 and 90A |
| 17CA. Functions of Electoral Trusts |
| 18DC Prescribed area, facilities and amenities for convention centres and particulars of audit report, for deduction under sub-section (7B) and clause (aa) of sub-section (14) of section 80-IB |
| 18DD Form of report for claiming deduction under sub-section (11B) of section 80-IB |
| 18DE Prescribed area, minimum seating capacity, facilities and amenities for convention centres; minimum number of convention halls in the convention centres; and particulars of audit report, for deduction under section 80-ID |
| 18BBE Computation of profits of certain activities forming integral part of a highway project for the purpose of section 80-IA |
| 21AC Furnishing of authorisation and maintenance of documents etc. for the purposes of section 94A. |
| 18DA Prescribed conditions for deduction under sub-section (8A) of section 80-IB |
| 18DB Prescribed area, facilities and amenities for multiplex theatres and particulars of audit report, for deduction under sub-section (7A) and clause (da) of sub-section (14) of section 80-IB |
| 20 Guidelines for approval under clause (xix) of sub- section (2) of section 80C or under clause (xvi) of sub-section (2) of section 88 |
| 18DDA Form of report for claiming deduction under sub-section (11C) of section 80-IB |
| 20A Guidelines for approval under clause (xx) of sub- section (2) of section 80C or under clause (xvii) of sub-section (2) of section 88 |
| 16C Requirements for approval of a fund under section 10(23AAA) |
| 17 Exercise_of_option_etc_under_section_11 |
| 19A [OMITTED BY THE IT (THIRTY-SECOND AMDT.) RULES, 1999, W.E.F. 19-11-1999] |
| 19AB Form of report for claiming deduction under section 80JJAA |
| 19AC Form of certificate to be furnished under sub-section (3) of section 80QQB |
| 17A Application for registration of charitable or religious trusts, etc. |
| 17C Forms or modes of investment or deposits by a charitable or religious trust or institution |
| 19AE Form of report of accountant to be furnished under sub-section(3) of section 80LA |
| 20AB Evidence of payemnt of security transaction tax for claiming deduction under section 88E |
| 18AAA Prescribed authority for approval of a University or any educational institution of national eminence for the purpose of section 80G |
| 18AAAA Prescribed authority for the purpose of receiving separate accounts from trusts or funds or institutions for providing relief to the victims of earthquake in Gujarat |
| 18AAB Prescribed authority for approval of companies engaged in Scientific and Industrial Research and Development for the purposes of section 80-IA |
| 18B Form of audit report for claiming deduction under section 80HH |
| 18AAAAA Guidelines for specifying an association or institution for the purposes of notification under clause (c) of sub-section (2) of section 80G |
| 18BBB Form of audit report for claiming deduction under section 80-I or section 80-IA or section 80-IB |
| 21A Relief when salary is paid in arrears or in advance, etc. |
| 21AA Furnishing of particulars for claiming relief under section 89(1) |
| 18BBA Form of reports for claiming deduction under section 80HHB or under section 80HHC or under section 80HHD and prescribed authority under section 80HHD |
| 18BBC Prescribed authority for approval of hotels located in certain areas |
| 18BBD Prescribed authority for approval of companies carrying on Scientific and Industrial Research and Development |
| 18C Eligibility of Industrial Parks for benefits under section 80-IA (4)(iii) |
| 18 [OMITTED BY THE IT (THIRD AMDT.) RULES, 1973, W.E.F 1-4-1974] |
| 18A [OMITTED BY THE IT (THIRD AMDT.) RULES, 1976, W.E.F 1-4-1976] |
| 18AA [OMITTED BY THE IT (FIFTH AMDT.) RULES, 1996, W.R.E.F. 1-4-1993] |
| 16B Prescribed authority for the purposes of clauses (8A) and (8B) of section 10 |
| 16CC Prescribed form of audit report under tenth proviso to section 10(23C) |
| 16D Form of Report for claiming deduction under section 10A |
| 16E Form of Report for claiming deduction under section 10B |
| 16F Form of Report for claiming deduction under section 10BA |
| 17B Audit report in the case of charitable or religious trusts, etc. |
| 21B [OMITTED BY THE IT (THIRTY-SECOND AMDT.) RULES, 1999, W.E.F. 19-11-1999] |
| 18D Prescribed authority for approval of companies carrying on scientific research and development |
| 19 [OMITTED BY THE IT (FIFTH AMDT.) RULES, 1989, W.E.F. 18-5-1989] |
| 19AD Prescribed authority for purposes of sub-section(2) of section 80RRB and form of certificate to be furnished under sub-section(2) of section 80RRB |
| 21 [OMITTED BY THE IT (FIFTH AMDT.) RULES, 1989, W.E.F. 18-5-1989] |
| 17D Prescribed foreign projects for the purposes of deduction in respect of profits and gains from projects outside India under section 80HHB |
| 18BB Form of audit report for claiming deduction under section 80HHA |
| 16A Prescribed authority for approving any institution or body established for scientific research |
| 16DD Form of particulars to be furnished along with return of income for claiming deduction under clause (b) of sub-section (1B) of section 10A |