IRS Notice CP518 is a final reminder that the Internal Revenue Service has no record of a federal tax return it believes should have been filed. It does not necessarily mean the recipient owes tax, but it does mean the missing-return question should be addressed promptly.
For Americans overseas, the notice can be confusing. A person may have paid tax where they live and assumed there was nothing left to report to the United States. Others may have filed but encountered postal delays or processing problems. Whatever the cause, CP518 should not go unanswered.
Why would the IRS send a final reminder?
The IRS generally sends CP518 when its records continue to show that a required return is missing. Third-party income information may indicate that the recipient crossed a filing threshold.
There are several possible explanations:
- The taxpayer was required to file but did not submit the return.
- A return was filed recently and has not yet been processed.
- The return was sent but was not matched correctly to the taxpayer’s account.
- The person was not required to file, but the IRS does not have enough information to reach that conclusion.
The year printed on the notice matters. CP518 can relate to an older filing period, so recipients should not assume it concerns the most recent return.
Does living abroad remove the requirement to file?
Living outside the United States does not end a US citizen’s federal filing obligations. The United States generally taxes citizens on worldwide income, although the Foreign Tax Credit and Foreign Earned Income Exclusion may reduce double taxation.
That distinction catches people out. Owing no additional US tax is not the same as having no filing requirement. An American working in the United Kingdom, Australia or the Philippines may pay income tax locally and still need to report income to the IRS.
Foreign accounts and assets can create separate reporting duties, including the Foreign Bank Account Report or Form 8938. Resolving CP518 should therefore involve reviewing the entire year rather than sending an incomplete return simply to respond quickly.
What should someone do after receiving CP518?
The right response depends on what actually happened with the return.
| Situation | Practical next step |
| The return was never filed | Prepare an accurate past-due return and follow the submission instructions in the notice |
| The return was filed recently | Check current IRS guidance before sending a duplicate |
| The return was filed some time ago | Gather proof of filing and follow the notice instructions for providing a signed copy or explanation |
| No return was required | Explain why and provide the requested information rather than ignoring the notice |
| The tax cannot be paid in full | File the required return and then review available payment options |
Recipients should check their name, taxpayer identification number, tax year and response address, then retain copies and evidence of delivery.
Form 15103 may be used to explain whether the return was filed late, previously filed or not required. The notice and current IRS instructions should guide the response.
What if the return was already filed?
Receiving CP518 does not prove that no return was sent. International paper returns can take time to process, while identification errors can prevent correct matching.
Confirm when and how the return was filed. Useful records include postal tracking, an electronic filing acknowledgement and a signed copy. An IRS account transcript may show whether the return posted.
Sending a duplicate immediately may create more confusion. Current guidance distinguishes between returns filed recently and those filed longer ago, so follow the notice’s timeframe and instructions.
What happens if CP518 is ignored?
If the issue remains unresolved, the IRS may prepare a Substitute for Return using available information. It may not reflect all deductions, credits or circumstances the taxpayer could claim.
The IRS may later propose an assessment and issue a notice of deficiency. If assessed tax remains unpaid, collection procedures can follow. Penalties and interest may also apply.
Delay narrows the taxpayer’s options. It is easier to explain, provide proof or file accurately before the matter moves further through enforcement.
Can an expat still use a compliance procedure?
Some Americans abroad may qualify for an IRS procedure for taxpayers whose failure was non-willful. A notice alone does not determine eligibility; filing history, conduct and the stage of IRS contact matter.
An expat considering a catch-up procedure should avoid filing piecemeal. The CP518 Notice from the IRS should be reviewed alongside the person’s filing history, foreign accounts and reasons for noncompliance.
The final reminder is a chance to correct the record
CP518 signals that the IRS considers a filing issue unresolved. It is also an opportunity to correct the record before a substitute return or proposed assessment complicates matters.
The safest response is neither panic nor silence. Verify the year, establish whether filing was required, gather evidence and use the channel stated on the notice. If foreign assets, multiple missing years or uncertain procedures are involved, experienced professional advice may be worthwhile.
