I understand that I need to have lived in my main home for more than 750 days out of the previous 5 years in order to qualify for the $500K capital gains exception allowable for a married couple. I also get it that I need proof that it is my main home by having the address on my drivers license/car registration, voter registration, official USPS address, etc. But how do I prove to the IRS how many days I actually lived in the home? What is the evidence they will accept to show that I was there for say, 751 days during the previous five years? Do they take my word for it? Would a personal calendar be adequate proof? The IRS site says nothing about how they check out the claim that you lived at a particular address for a certain amount of time. Can you help?
