What This Letter Means

Letter 545 comes out of an IRS correspondence audit of a "multiple filer" situation. That happens when the same Social Security number appears on two returns for the same year: once as the primary taxpayer on a separate return (single, head of household, or married filing separately) and once as the spouse on a joint return.

The IRS usually tries to sort this out first with Letter 31C. If that doesn't resolve it, the case goes to Examination. Letter 545 is the 30-day letter the examiner sends when the IRS proposes to change the joint return, the separate return, or both, to married filing separately. It comes with Form 4549, Income Tax Examination Changes, showing the recalculated tax.

Why the IRS Is Doing This

Common triggers include a spouse who says they never signed the joint return, or a joint return and a separate return filed for the same year with no response to the IRS's earlier questions. When the status changes to married filing separately, the IRS removes the spouse's income, the spousal items, and duplicate dependents, along with the credits tied to them. That usually raises the tax.

What to Do

  • Read Form 4549 and compare it to both returns.
  • If you agree, sign and return the report as the letter instructs.
  • If you disagree, send a written explanation with documents by the date on the letter. A valid joint return signed by both spouses, a divorce decree, or proof of your marital status are the kinds of records that matter here.
  • If you can't settle it with the examiner, ask about an Appeals conference.
  • Keep copies of everything you send.

If You Don't Respond

These cases follow deficiency procedures. If you don't respond, expect a Statutory Notice of Deficiency. That notice carries a hard deadline to petition the Tax Court. Deal with this letter now so you aren't working against that clock later.

If someone filed a joint return using your number without your signature, say so clearly in your response.

If you received Letter 545 and the filing status change doesn't match your situation, call us at (813) 229-7100.