Generally, both you and your spouse are each responsible for paying the full amount of tax, interest, and penalties on your joint return. However, you may qualify for relief from liability for tax on a joint return if (a) there is an understatement of tax because your spouse omitted income or claimed false deductions or credits, (b) you are divorced, separated, or no longer living with your spouse, or (c) given all the facts and circumstances, it would not be fair to hold you liable for the tax. You may also qualify for relief if you were a married resident of a community property state but did not file a joint return and are now liable for an underpaid or understated tax. To request relief, you generally must file Form 8857 no later than 2 years after the date on which the IRS first attempted to collect the tax from you. For more information, see Pub. 971 and Form 8857 or you can call the Innocent Spouse office toll-free at 1-866-897-4270.