US
USTax

Document Preparation Guide

Having the documents below ready before starting the wizard will make the process faster and more accurate.

🗂️FORM1040🏦FBAR📋FATCA
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Form 1040 — Required Documents

Gather these documents for your individual income tax return

ID & Basic Information

  • Passport or driver's license copy
  • SSN / ITIN number
  • Spouse & dependents' SSN
  • Prior year tax return (if available)

US Income Documents

  • W-2 from employer
  • 1099-NEC (freelance / contractor)
  • 1099-MISC (other income)
  • 1099-INT (interest)
  • 1099-DIV (dividends)
  • 1099-B (stock / ETF sales)
  • K-1 (partnership / S-Corp)
  • SSA-1099 (social security benefits)

Korean Income Documents

  • Korean employment withholding certificate (annual)
  • Business income ledger / tax invoices
  • Rental income contracts & records
  • Interest & dividend payment confirmations

Deduction Documents

  • Mortgage interest statement (Form 1098)
  • Medical expense receipts (out-of-pocket)
  • Tuition statement (Form 1098-T)
  • Charitable donation receipts
  • Business expense receipts (self-employed)
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FBAR (FinCEN 114) — Required Documents

Gather documents for each foreign financial account

Per-Account Required Information

  • Institution name (bank, brokerage, etc.)
  • Account number (or last 4 digits)
  • Country where institution is located
  • Account type (savings, investment, pension, etc.)
  • Maximum balance during the year
  • Year-end balance (as of December 31)
  • Whether jointly owned

Reference: FBAR Filing Thresholds

  • Combined balance exceeding $10,000 at any point may trigger FBAR requirement
  • USD conversion uses IRS-published exchange rates
  • Actual filing obligation confirmed by tax professional
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FATCA (Form 8938) — Required Documents

Gather documents for specified foreign financial assets

Per-Asset Required Information

  • Asset type (deposit, stock, fund, insurance, pension, etc.)
  • Issuer or institution name
  • Maximum value during the year
  • Year-end value (12/31)
  • Whether income (interest, dividends) was generated
  • Currency

Reference: FATCA Thresholds (approximate)

  • US residents: $50,000 at year-end or $75,000 at any point
  • Foreign residents: $200,000 at year-end or $300,000 at any point (double for MFJ)
  • Exact thresholds and applicability confirmed by tax professional

⚠️ Important Notice

The list above is a general guide. Additional documents may be required depending on individual circumstances. Actual filing requirements and document needs are confirmed by your tax professional.