1. Fail to file a return for any tax year that one is due on your worldwide income? The statute of limitations nevers runs out to assess taxes for that year. The IRS can come after you 10 years from now and assess taxes if you never filed the required return or forms.
2. Fail to pay taxes on past filed returns or assessed by the IRS? The normal statute of limitations is 10 years from the date of assessment and filing a tax lien (that may be a later date from the date you filed the return) to collect tax. However, if you leave the country or the tax is assessed while you are outside the USA, that statue of limitations is put on hold until you return to the USA when it starts to run again. WHEN YOU OWE TAXES AND ARE OUTSIDE THE USA THE STATUTE OF LIMITATIONS TO COLLECT THOSE TAXES NEVER RUNS OUT.
3. Failed to file Foreign Bank Account Reporting Forms (FBAR or now form 114)? The statute of limitations to assess penalties for failing to file is 6 years from the due date of each years forms.
6. Criminal Tax Evasion - the statute for possible criminal prosecution is most often 6 years, but there are exceptions.
7. The statute of limitations for IRS action for civil fraud (this means assessment of the 75% civil fraud monetary penalty against a taxpayer) is indefinite and never runs out. Therefore if you cheat on your tax return you are never safe.
8. If you owe $50,000 or more the IRS can have your passport taken away when you enter the US.
As a Tax Attorney, you can talk with us without fear of anything you say being used against you due to the rule of "attorney - client privilege."