I agree with views of Ld Friend Amit Ji. Just to add/ elaborate this view:
Notification No. 3/2019 in column (3) reads as under:
“(i) Construction of affordable residential apartments by a promoter in a Residential Real Estate Project (herein after referred to as RREP) which commences on or after 1st April, 2019 or in an ongoing RREP in respect of which the promoter has not exercised option to pay central tax on construction of apartments at the rates as specified for item (ie) or (if) below, as the case may be, in the manner prescribed therein, intended for sale to a buyer, wholly or partly, except where the entire consideration has been received after issuance of completion certificate, where required, by the competent authority or after its first occupation, whichever is earlier.
(ia) Construction of residential apartments other than affordable residential apartments by a promoter in an RREP which commences on or after 1st April, 2019 or in an ongoing RREP in respect of which the promoter has not exercised option to pay central tax on construction of apartments at the rates as specified for item (ie) or (if) below, as the case may be, in the manner prescribed therein, intended for sale to a buyer, wholly or partly, except where the entire consideration has been received after issuance of completion certificate, where required, by the competent authority or after its first occupation, whichever is earlier.
Column (5) reads as :
Provided also that where value of input and input services received from registered suppliers during the financial year (or part of the financial year till the date of issuance of completion certificate or first occupation of the project, whichever is earlier) falls short of the said threshold of 80 per cent., tax shall be paid by the promoter on value of input and input services comprising such shortfall at the rate of eighteen percent on reverse charge basis and all the provisions of the Central Goods and Services Tax Act, 2017 (12 of 2017) shall apply to him as if he is the person liable for paying the tax in relation to the supply of such goods or services or both;
Master Notification 11/2017 CT-R reads as under:
G.S.R......(E).- In exercise of the powers conferred by sub-section (1) of section 9, subsection (1) of section 11, sub-section (5) of section 15 and sub-section (1) of section 16 of the Central Goods and Services Tax Act, 2017 (12 of 2017), the Central Government, on the recommendations of the Council, and on being satisfied that it is necessary in the public interest so to do, hereby notifies that the central tax, on the intra-State supply of services of description as specified in column (3) of the Table below, falling under Chapter, Section or Heading of scheme of classification of services as specified in column (2), shall be levied at the rate as specified in the corresponding entry in column (4), subject to the conditions as specified in the corresponding entry in column (5) of the said Table:-
Since the entire consideration has been received after Completion Certificate is received, the Entries (i) and (ia) above are not applicable. As such, the conditions under Column (5) is also not attracted.