If you fail to meet the two-out-of-five year ownership and use tests, you can qualify for a partial exclusion (related to the period of time you were in the home) if you can show that the move was because of an unforeseen circumstance. There have been a number of examples given by the IRS on what constitutes an unforeseen circumstance (e.g., divorce, unemployment, multiple births from a single pregnancy). If you have one of these or believe your situation is an unforeseen circumstance, you can claim the partial exclusion. Be prepared to defend your position if the IRS questions your return. These are the factors used by the IRS to decide whether the sale is the result of an unforeseen circumstance:
To be absolutely sure, you can ask the IRS’s opinion about whether your situation qualifies by submitting a private letter ruling request. There’s a user fee for making this request.
Advance payment of current tax liability based either on wage withholdings or installment payments of your estimated tax liability. To avoid penalties, you generally must pay to the IRS either 90% of your final tax liability, or either 100% or 110% of the prior year’s tax liability, depending on your adjusted gross income.