The Expat Form Map: Argentina

Which US tax forms usually apply to a US citizen living in Argentina. Tax year 2026, filed in 2027.

Form	It usually applies if…	Key number or rule
Form 1040	Your gross income is above the filing threshold, wherever you live and in any currency.	US citizens file on worldwide income.
Form 2555 (FEIE)	You want to exclude foreign earned income and you pass the bona fide residence test or the physical presence test.	Up to $132,900 for 2026. Physical presence = 330 full days abroad in 12 months.
Form 1116 (FTC)	You paid Argentine income tax (e.g. Ganancias) and want a credit instead of, or on top of, the FEIE.	How monotributo's components are treated is a question for your preparer.
Schedule SE	You're self-employed (freelance or monotributo) with $400+ in net earnings.	The FEIE does not reduce SE tax. The US and Argentina have no totalization agreement.
FBAR (FinCEN 114)	Your foreign accounts together topped $10,000 at any moment of the year.	Filed with FinCEN, not the IRS. List every account with its maximum balance.
Form 8938 (FATCA)	You live abroad and your foreign financial assets exceed the threshold.	Single: over $200k at year end or $300k at any time. Joint: $400k / $600k.
Form 1040-ES	You expect to owe tax (often self-employment tax).	Quarterly estimated payments.

Dates for tax year 2026

Apr 15, 2027: regular due date, and the date interest starts on any tax owed.
Jun 15, 2027: automatic 2-month extension to file if you live outside the US. Attach a statement saying you qualify.
Oct 15, 2027: extended deadline with Form 4868. Also the automatic FBAR extension.

What to collect now (the 10-minute version)

Income by month, in ARS and USD, with the exchange rate you used and why.
Days in and out of the US (passport stamps, flights).
The highest balance of each foreign account during the year: banks, brokers and wallets. Ask your preparer which ones count.
Argentine taxes paid: Ganancias, monotributo receipts.
Last year's return, if you filed.

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General information only, not tax, legal or financial advice. Confirm your situation with a qualified professional. Sources: IRS FEIE (Rev. Proc. 2025-32: $132,900 for 2026) · FinCEN FBAR · IRS Form 8938 instructions · SSA international agreements · IRS 2-month extension abroad.