If two taxpayers filed a Married Filing Joint return that was accepted by the IRS, and want to complete amended returns to change the filing status to Married Filing Separate, please note the following:
See the Help Topic Amending Your Federal Return - Form 1040X for more information.
The person with the secondary social security number on the original return will need to file a new return with a filing status of Married Filing Separately, and mail this return to the IRS.See the Help Topic Filing a Paper Return for more information.