The Litmus tax library
Prepare for your next tax filing
Practical guides to individual and business tax returns, international filing questions, ITIN applications and EIN administration.
60 articles found.
International Tax
Form 5472 Extension Planning with Form 7004
Plan a Form 5472 extension with Form 7004, including foreign-owned LLC instructions, filing evidence, payment distinctions and a records timetable.
Read article ↗EIN
Form SS-4 for a Foreign-Owned LLC: Information to Prepare
Prepare Form SS-4 for a foreign-owned LLC with a clear legal name, ownership summary, address record and filing purpose before sending an EIN application.
Read article ↗Individual Tax
How to Prepare an Amended Tax Return with Form 1040-X
Understand when Form 1040-X may be needed, how to document changes and what to review before submitting an amended individual federal tax return.
Read article ↗ITIN
ITIN Application Documents: A Practical W-7 Checklist
Prepare your ITIN application documents with a practical W-7 checklist covering passports, certified copies, tax returns and common document mistakes.
Read article ↗ITIN
ITIN Application Options: CAA, Acceptance Agent or IRS Appointment
Compare CAA, Acceptance Agent and IRS appointment routes for ITIN applications, including document authentication, fees and questions to ask first.
Read article ↗ITIN
ITIN Applications for Dependents: Documents and Eligibility
Prepare a dependent ITIN application by checking tax-benefit eligibility, identity documents, US residency evidence and the correct family submission.
Read article ↗ITIN
ITINs for Spouses and the Joint Return Election
Review how a spouse ITIN application connects to a joint return election, worldwide income, supporting documents and future-year filing consequences.
Read article ↗EIN
Lost Your EIN Letter? Understanding Confirmation and Verification
Find the difference between a lost EIN and missing proof, review digital CP575 and Letter 147C options, and prepare for authorized IRS verification.
Read article ↗Business Tax
Partnership Tax Returns: Form 1065 and Schedule K-1
Understand Form 1065 and Schedule K-1, organise partner and accounting records, and prepare for a partnership tax return without confusing profit with cash.
Read article ↗Business Tax
Preparing a C Corporation Tax Return with Form 1120
Prepare for Form 1120 with clear accounting, shareholder and asset records. Understand the review steps, book-tax differences and questions to resolve early.
Read article ↗Individual Tax
Protecting Your Tax Return with an IRS Identity Protection PIN
Understand how an IRS IP PIN protects federal tax filings, how to keep it secure and what to check if a return is rejected or the current PIN is missing.
Read article ↗Individual Tax
Reconciling Form 1099-B and Capital Gains Records
Reconcile Form 1099-B with investment records, identify missing basis or duplicate imports, and prepare clear information for capital gains tax reporting.
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