You will either need to locate the Settlement Documents from the Original Purchase of the Home, or somehow reconstruct those amounts.
You should start by contacting the settlement agent for the purchase of the home and hopefully they will be able to supply you with a copy of the Settlement Documents. Other parties that may have copies of the Settlement Documents include your real estate agent, the seller's real estate agent, mortgage broker, the financial institution that held the loan for the property, or the seller himself.
If you are unable to obtain the settlement papers from any of those parties, you will need to reconstruct the transaction and estimate the amounts from whatever evidence you can gather from bank records, emails/correspondence, old property tax bills, or any other documentation involving the purchase or value of the Home that you sold.