You can claim pexemption u/s 54B, 54EC, 54F
54B- with in 2 years you have to purchase a new agricultural land (or) you have to use the amount for agricultural purpose. So you have 2 years time to purchase said land. but you have to deposit the whole amount to Capital Gains Savings Accounts in any bank has such CGAS scheme notified by Central government. The deposit should be made in this financial year only.
54EC- within 6 months you can deposit up to 50,00,000 in NHAI (National Highway authorioties of India) bonds or RECL (Rural Electrification Corporation Limited) bonds.
54F- within 3 years you have to construct a house property or with in 2 years you have to purchase a house property. So you have 2 years time to purchase said property or 3 years to construct said property. but you have to deposit the whole amount to Capital Gains Savings Accounts in any bank has such CGAS scheme notified by Central government. The deposit should be made in this financial year only.