As long as you aren't married or in business together, it doesn't sound like the IRS can possibly come after you. There aren't enough facts to be absolutely certain. It depends on what you mean by 'partner.'
The IRS can definitely levy (seize) the joint account. Consider speaking with a local tax professional to be sure, as these situations depend on the specific facts and circumstances of your case.
Robert Hoffman is a tax attorney licensed in California. The information presented here is general in nature and is not intended as a substitute for legal advice. This posting does not create any attorney-client relationship with the author. For competent advice about your particular situation, consult your own attorney.
No, you are not responsible for your partners tax problems unless you are married and filed a joint return.
That said, and as my colleague noted, if they were to seize monies from a joint account that may affect you.
You should discuss with a local tax professional.
Most of us here offer a free phone consult.
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The IRS can levy your joint bank account and seize the balance. Since you have no other joint assets, you have nothing to worry about. You should direct the person you live with to good tax lawyer.
I hope this helps!
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My advice would be to close your joint account immediately. Although you are not personally responsible you do not want to run into any problems down the road. You should advise your partner to seek out help right away to resolve his/her problems.