Blog (EN)

Navigating the Strict State Taxes of New York and California: Residency Risks for Individuals Returning to Japan

日本に帰国した後も、ニューヨーク州(NY)とカリフォルニア州(CA)の州税の居住者として判定され、全世界所得に対して高額な州税が課されるリスクがあります。本記事では、NY州の「ドミサイル」と「法定居住者」テスト、CA州の「事実と状況」テストを詳細に解説し、日本帰国後の具体的なリスク、ケーススタディ、そして適切な対策について、プロの税理士が徹底的に解説します。連邦税の非居住者判定と州税の判定の違い、二重課税のリスク、よくある間違いについても触れ、読者が完全に理解できるよう網羅的な情報を提供します。

Navigating the Strict State Taxes of New York and California: Residency Risks for Individuals Returning to Japan 続きを読む »

The Definitive Guide to Filing US Tax Returns (1040/1040NR) from Japan After Repatriation: Procedures, Payment, and Refund Methods

Repatriating to Japan from the United States does not necessarily conclude your US tax obligations. For US citizens, Green Card holders, and even non-resident aliens with US-sourced income, navigating the complexities of US taxation from abroad can be daunting. This guide provides a detailed explanation of filing US tax returns from Japan, including forms, payment, and refund methods.

The Definitive Guide to Filing US Tax Returns (1040/1040NR) from Japan After Repatriation: Procedures, Payment, and Refund Methods 続きを読む »

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FICA Tax Payment Delays Are Fatal! The Terror of IRS Trust Fund Recovery Penalty (TFRP) Extending to Business Owners Personally

FICA tax payment delays pose a fatal risk to business owners, extending personal liability through the IRS’s Trust Fund Recovery Penalty (TFRP). This article explains the TFRP mechanism, defines responsible persons, outlines assessment requirements, and details the personal impact on business owners and key personnel. Through case studies, preventative measures, and FAQs, it provides comprehensive knowledge to protect against this severe penalty.

FICA Tax Payment Delays Are Fatal! The Terror of IRS Trust Fund Recovery Penalty (TFRP) Extending to Business Owners Personally 続きを読む »

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Your Comprehensive 2026 Guide to Obtaining an ITIN for a Spouse or Child Without an SSN: Mastering Form W-7

For individuals with U.S. tax obligations, obtaining an Individual Taxpayer Identification Number (ITIN) is crucial, especially for spouses or children without a Social Security Number (SSN). This comprehensive 2026 guide details the ITIN application process and Form W-7 completion, covering eligibility, required documents, application methods, common pitfalls, and case studies to ensure a thorough understanding and smooth application.

Your Comprehensive 2026 Guide to Obtaining an ITIN for a Spouse or Child Without an SSN: Mastering Form W-7 続きを読む »

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Mastering FICA Tax Withholding: Preventing Under-withholding and Calculation Errors with Gusto and QuickBooks Payroll

Gusto and QuickBooks Payroll are powerful tools for preventing FICA tax under-withholding and calculation errors. This article comprehensively covers FICA tax basics, how these platforms handle Social Security wage limits and Additional Medicare Tax, provides concrete calculation examples, and details their benefits, drawbacks, and common pitfalls. It offers a practical guide for small businesses to avoid IRS penalties and ensure robust tax compliance.

Mastering FICA Tax Withholding: Preventing Under-withholding and Calculation Errors with Gusto and QuickBooks Payroll 続きを読む »

How to Report Japanese Rental Income and Dividends on TurboTax: A Step-by-Step Guide to the Foreign Tax Credit

A comprehensive guide to accurately reporting Japanese rental income and dividends on TurboTax and maximizing your Foreign Tax Credit. This article simplifies complex tax processes, provides step-by-step instructions, essential tips, and practical advice to avoid double taxation.

How to Report Japanese Rental Income and Dividends on TurboTax: A Step-by-Step Guide to the Foreign Tax Credit 続きを読む »

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Essential Guide for US Employers: FICA Tax Calculation, Simulations, and Payment Rules

For any business employing individuals in the United States, understanding and properly managing FICA tax is fundamental. This comprehensive guide details FICA tax calculation, simulations, payment rules, and common pitfalls, providing employers with all the information they need to achieve full compliance and confidence.

Essential Guide for US Employers: FICA Tax Calculation, Simulations, and Payment Rules 続きを読む »

Mastering Form W-4: A Comprehensive Guide for Japanese Nationals on Adjusting U.S. Tax Withholding

This comprehensive guide for Japanese nationals explains how to correctly fill out Form W-4, including post-2020 changes, to properly adjust tax withholding in the U.S. It covers practical scenarios, common mistakes, and FAQs, offering insights into smart tax management. Special attention is given to dependent claims and tax residency status, common concerns for Japanese individuals.

Mastering Form W-4: A Comprehensive Guide for Japanese Nationals on Adjusting U.S. Tax Withholding 続きを読む »