Review formation details, federal tax classification, the reporting period, state activities, and transactions with the Japanese parent—not just financial results.
No revenue or a loss does not automatically eliminate filing obligations. Ordinary domestic corporations generally must file a federal income tax return even without taxable income.
Reference: IRS — Instructions for Form 1120
1. Company Details and Tax Classification
Confirm the legal name, formation date and state, address, EIN, and ownership.
An LLC’s federal classification depends on ownership and elections. It may be treated as a corporation, partnership, or disregarded entity.
Reference: IRS — Limited Liability Company
2. Reporting Period and Accounting Methods
Review formation, business commencement, and year-end dates. The first return may cover a short tax year.
Accounting methods and initial elections can affect later filings.
Reference: IRS — Publication 583
3. Formation Costs and Funding
Classify organizational and start-up costs, equipment, deposits, and professional fees. Not every payment is immediately deductible.
Identify parent-funded amounts as capital, loans, reimbursements, or other transactions, and reconcile company records with bank and parent-company balances.
Reference: IRS — Publication 542
4. Parent and Related-Party Transactions
Review sales, services, management charges, interest, and financing.
Qualifying foreign-owned U.S. corporations with reportable transactions may need Form 5472. A foreign-owned U.S. single-member LLC treated as disregarded may also need Form 5472 with a pro forma Form 1120.
Reference: IRS — Instructions for Form 5472
5. State, Local, and Other Taxes
Review obligations wherever the company operates, not only its formation state. California, for example, considers business activities and sales, property, and payroll thresholds.
Also assess payroll, sales and use, and property taxes as applicable.
Reference: California FTB — Doing Business in California
6. Filing and Payment Calendar
Identify return deadlines, extensions, payment dates, and estimated payments based on classification and year-end. Include the following year’s requirements in the calendar.
Records to Gather
- Formation documents, EIN notice, and elections
- Ownership details and percentages
- Trial balance, general ledger, and bank statements
- Start-up costs and fixed-asset records
- Related-party agreements, transactions, and balances
- State registrations and operational footprint
- Returns already filed and payment records
We review the company’s circumstances and explain required filings, documents, and our engagement scope. Please provide only an overview initially.
This answer provides general information. Classification, ownership, activities, and the tax year determine requirements. A Japanese company’s U.S. branch has different rules from a U.S. subsidiary.
Information reviewed: October 14, 2026
