Mere family settlement is not liable to capital gain, so says the Karnataka High Court
https://www.kpmg.com/IN/en/services/Tax/FlashNews/Nagaraja-Rao.pdf
As per S. 47
Nothing contained in section 45 shall apply to the following transfers :—
(i) any distribution of capital assets on the total or partial partition of a Hindu undivided family;
[Practically partial is not allowed]
There shall be a long term capital gain and period of holding will include period of holding of previous owner, the date for the purpose of indexation (be it acquisition or improvement) shall also be taken when the asset was so acquired by previous owner
[DO NOTE THAT Since property was acquired in 1976, you will need to detemine the Fair market Value as on 1.4.1981]
As per Explanation b to S.2(42A)
In the case of a capital asset which becomes the property of the assessee in the circumstances mentioned in sub-section (1) of section 49 there shall be included the period for which the asset was held by the previous owner referred to in the said section ;
As per S. 49. (1) Where the capital asset became the property of the assessee—
(i) on any distribution of assets on the total or partial partition of a Hindu undivided family;
(ii) under a gift or will;
(iii) (a) by succession, inheritance or devolution, or
How to detemine the FMV as on 1.4.1981 ?
You may make an application to the registrar/sub registrar of the property and ask them to give the details of the transfers which occurred ,in the area where the property to be valued is situated , on or around 1.4.1981 .
You will get a list of transactions , we need to compute the WEIGHTED AVERAGE cost per sq yard and then apply that rate to the area of the property to be valued.
Alternatively one may go to certified valuer for this purpose or request AO to refer the case to departmental valuation officer.
FMV as on 01.04.1981 shall be deemed to be FMV to you and it shall be indexed accordingly, if there is any cost of improvement post 01.04.1981 then it also has to be considered.
Cost of improvement pre 01.04.1981 shall be ignored.
There shall be no tax effect of INR 10Lacs.
Further you may claim exemption u/s 54 on this Long term cap gain from sale of flat. Refer to the provision for more details.
If theres any more info you need, let us know.