Hello again JA Customer,
First, there is no "inheritance" tax at the federal level. Instead, the IRS imposes estate tax based on the value of the entire estate. If your father died in the year 2008, then if his total estate was valued at $2 million or less, no estate taxes would have been due.
There are many tax law changes which will be effective next year. Most likely the one you have heard about which could affect you is the increase in the capital gains tax rate. That rate will be changing from 15% to 20%. However, in your particular case, you would not owe any capital gains tax if you have no gain from the sale.
As explained in my first post, when your father passed away you and the other heirs were entitled to a stepped up basis in the home. If the home was worth $450,000 when your father died, then $450,000 is your basis. When you sell the home you would calculate your gain (if any) by taking the sale price, less that basis, less the cost of any real estate commissions. If you sell the home for $450,000 and your basis is $450,000, then you have no gain and owe no taxes. You would only owe tax if you sold the home for more than what it was worth on the day your father passed away.
Thank you JA Customer