I say this as a professional credentialed tax preparer and real estate broker, this is not just as simple as "what tax forms do I need".
Since the home was left to you in a will, was the will probated?
How was the property initially conveyed to your father; how was it titled?
Were you or your sister ever added to the title, prior to his death?
Is the home now titled in both your name and your sister's name?
What is the stepped-up basis on the home, since his death?
Are you or your sister the executor of the estate?
Who will file the final return for the decedent?
Will file the estate return(s), until the estate is conveyed to the beneficiaries?
If you are not sure about the answers, you should consult a tax professional and/or an attorney who specializes in Trusts and Estates. I promise you it is well worth the advice now, and in the future when and/or if the home is sold.
