List of Income Tax Circulars (2018) issued by CBDT for making amendments in provisions of Income Tax Act/ Rules, along with pdf copy download link.

CBDT Income Tax Circular No./ Date/ Particulars
Circular 9/2018 dt. 26 Dec. 2018: CBDT extends due date for furnishing of report u/s 286(4).
Circular 8/2018 dt. 26 Dec. 2018: CBDT issues “Explanatory Notes to the Provisions of Finance Act, 2018.
Circular 7/2018 dt. 20 Dec. 2018: Condonation of delay under IT section 119(2)(b) in filing of Form no. 10 and Form No. 9A for AY 2016-17.
Circular 6/2018 dt. 17 Aug. 2018: CBDT defers implementation of reporting requirements under ‘clause 30C pertaining to GAAR’ and ‘clause 44 pertaining to GST’ of the Revised Form 3CD upto 31 March 2019, notified on 20 July 2018 (applicable from 20 Aug. 2018).
Circular 5/2018 dt. 16 Aug. 2018: CBDT Clarification on Immunity provided to an Assessee u/s 270AA of Income-tax Act, 1961, i.e. grant of immunity by AO from penalty, etc. proceedings for any assessment year shall not preclude such assessee from contesting the same issue in any earlier assessment year.
Circular 4/2018 dt. 14 Aug. 2018: CBDT Clarification on Computation of admissible deduction u/s 10A of the Income Tax Act, 1961.
Circular 3/2018 dt. 11 July 2018: CBDT raises threshold monetary limits for filing Departmental Appeals before Appellate Tribunal (ITAT)/ HC/ SC. Frther, it may be noted that CBDT has amended Para 10 of the Income Tax Circular No. 3 of 2018 dt. 11 July 2018 vide Corrigendum dt. 20 Aug.2018
Circular 1/2018 dt. 10 Jan. 2018: CBDT prescribes procedure for Processing of ITRs (1~6) u/s 143(1)(a)(vi), i.e. relating to adjustment/ addition of income appearing in Form 26AS/ Form 16A/ Form 16 which has not been included in computing the total income as per the ITR.

CBDT Updates (Income Tax)
For downloading various Income Tax Circulars, Instructions, Notifications, Orders, Press Releases, etc. issued by the Central Board of Direct Taxes (CBDT) in different years, please refer the following links:
CBDT Circulars: 2020, 2019, 2018, 2017
CBDT Instructions: 2020, 2019, 2018
CBDT Notifications: 2020, 2019, 2018, 2017
CBDT Orders: 2020, 2019, 2018, 2017
CBDT Press Releases: 2020, 2019, 2018
Note: For Official/ updated copy of relevant Circulars/ Instructions/ Notifications/ Orders, please visit the Income Tax Deptt. website.