r2i forum

Hi,
I had sold my land long time back. Against the agreement terms, the buyer was unable to pay money on time. They are still paying even after 3 years. So, we increased the payment amount and time.
I have used the deposit/advance money for investment. My question is
1 Is it legal to invest before ragistry of sold property
2. When I have to pay my tax? I think it should be at the end of tansaction when I receive all the money agreed.

Could anyone please throw some light on this.

Please let me know if we need more details.

Thanks in advance