1. Long term capital of Rs.17,32,790 and tax would be Rs.2,12,220. Assuming both have invested equal amount in the plot and capital gain is assessable equally in the hands of both
2. Farm income more than Rs.5000 would be clubbed for rate purposes.
3. Before 31.08.2019, it should be deposited in capital gain account scheme to avail exemption and time period for investment purpose. You can still open the account and claim exemption citing floods.
4. No
5. If the taxable income is less than 5,00,000 it is Rs.1,000 otherwise Rs.5,000. It is late fees.