What is appropriate tax for this case?

I received money along with my bothers sisters and uncles when property inherited by us from my paternal grandfather, was sold ten years before. my 1/12th share. (2 uncles and 2 siblings and mother). Rs.10 Lac was not given by the builder then and held back as security until premises made vacant by tenants. But builder lapsed on the agreement for ten years for lack of money . Now after raising a legal notice by us, he has agreed to restart the project and pay Rs. 10 lac withheld. I had disclosed the full amount before ten years in my IT return as Capital Gains. I had put the indexed amount under NHAI bonds for 5 years. This amount then included the INR Ten lac receivable now. So Should I now re-disclose this INR 10 Lac amount in FY 24-25 ?. Is it necessary? In the meantime I lost my mother 2 years back. so her share of INR 10 Lac will be divided among her 3 children. So I will receive INR 10 lac/ 3 from my mothers bank account ,which is operable by my sister. how to treat this money in my return next year? The builder will enter into a agreement now to give interest on INR 10 Lac for ten years (as per previous agreement) in the form of space of 100 sft. but again convert this 100 sft x Rate per square foot to INR and pay at the time of plinth may be 1.5 to 2 years hence to me (and all others as well) . How to treat this substantial money to tax then? How to save tax on this amount receivable after 1.5 to 2 years. can it be treated as LTCG and amount diverted to NHAI bonds under sec 54c. Or can it be treated as hardship amount. Which is the safe way w.o. tax hurdle. or any other way. please let me know fast as we have to enter in to a MOU with Builder in coming few days.