A step-by-step walkthrough of business tax filing by entity type — Schedule C for sole props, Form 1065 for partnerships, 1120-S for S-corps, and 1120 for C-corps — with 2026 deadlines, document checklists, audit triggers, and when DIY software stops being enough.
A practical guide to how LLCs are actually taxed federally—disregarded entity, partnership, S-corp, or C-corp—when each classification makes sense, what the S-Corp election saves at $150K of profit, the 75-day Form 2553 deadline, and the six mistakes that most reliably trigger IRS audits.
A working guide to IRS Form 1065 for multi-member LLCs and partnerships—what the information return reports, who must file, the March 16, 2026 deadline, the $260-per-partner monthly late penalty, and the bookkeeping habits that prevent K-1 errors.
A four-member LLC that files Form 1065 six months late owes about $6,240 in federal penalties before any state assessment. This 2026 guide details every federal and state penalty an LLC can face for non-filing, the cascade of secondary consequences, and the step-by-step path back to good standing — including how First-Time Abate can wipe out the entire federal penalty in a single phone call.
A 2026 calendar of LLC tax deadlines by IRS classification — single-member LLCs file Schedule C on April 15, multi-member partnerships and S-corps file Forms 1065 and 1120-S on March 16, C-corps file Form 1120 on April 15. Covers Form 7004 extensions, quarterly estimates, and the $245-per-partner late-filing penalty.
Calendar-year partnerships must file Form 1065 and issue Schedule K-1s by March 16, 2026. Late filing costs $255 per partner per month, up to 12 months. This guide covers every federal deadline, Form 7004 extensions, quarterly estimates, and the Rev. Proc. 84-35 safe harbor for small partnerships.
Foreign-owned US LLCs face a $25,000 Form 5472 penalty per missed filing, 30% default withholding on US-source income, and tighter 2026 BOI rules. This guide covers the entity choices, forms, treaty benefits, and bookkeeping habits non-resident owners need to stay compliant.
Schedule K-1 reports your share of pass-through income from a partnership, S corporation, or trust — and you owe tax on your allocation, not on the cash you actually received. A working guide to each major box, the phantom income trap, partner basis rules, the 2026 filing timeline, and six mistakes that cost K-1 recipients real money every year.
Les societats col·lectives no paguen l'impost sobre la renda federal — els ingressos flueixen cap als socis a través de l'Annex K-1, els quals llavors han de pagar tant l'impost sobre la renda com l'impost sobre el treball autònom. Aquesta guia cobreix els terminis del Formulari 1065, les estimacions trimestrals, la sentència Soroban de 2023 sobre socis comanditaris i els cinc errors més costosos que cometen els socis de negocis.
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