TAXFINAI library · Guides

US tax and close guides, organized by your work question

Ten reference guides help tax managers, reviewers and firm owners connect a subject to a working method. Choose the question you need to resolve, in English or French.

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Guide · Checked

AI for accounting firms: it prepares, you decide

Evaluate AI for accounting firms: explainable calculations, draft commentary, human approval, client confidentiality and ten questions to ask a vendor.

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The short answer

A TAXFINAI guide develops a complete method around a defined tax, accounting or firm-management question. The ten guides below cover federal dates, estimated tax, sales tax, international returns, US subsidiaries, month-end close, cut-off, WIP, human review of AI and software security. Each links the method to relevant definitions, evidence and source material.

Plan the tax work before assigning the next step

Begin with the taxpayer, return year and jurisdiction. A federal calendar helps organize dates; estimated-tax work needs a documented calculation basis. Sales-tax obligations and international information returns need their own scope assessment. These guides keep the legal question separate from the team’s tracking method.

IRS tax calendar 2027

Build a prospective federal calendar, separate filing and payment dates, and identify exceptions to check.

IRS tax calendar 2027

US estimated tax

Document the baseline, distinguish individual and corporate rules, and organize the review and payment trail.

US estimated tax guide

Connect a US subsidiary’s books to its review file

A subsidiary close combines balances, supporting documents and group reporting requirements. Start with the overall sequence, then investigate the cut-off or international question that needs more detail. Distinguish the entity’s books from the group’s reporting basis rather than assuming that every treatment carries across unchanged.

Month-end close for a US subsidiary

Follow the preparation, cycle review, supporting evidence and approval sequence through the monthly workpaper.

Month-end close for a US subsidiary
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Make management and software decisions with clear inputs

These guides address three different decisions: how to interpret recorded work, how to review an AI proposal and what to ask a software provider. A useful conclusion identifies the inputs examined and the human decision that follows. A calculated signal, a proposal or a questionnaire answer is a starting point for that review.

Use the guide as a reference, then adapt the method

Read the opening answer and scope before choosing the relevant section. Follow the sources for the applicable year and framework, use the examples to understand the reasoning, and adapt the proposed steps to the engagement. Source-check dates document consultation; they do not establish professional approval.

When a downloadable resource accompanies the topic, the guide links to its file page: the calendar, close checklist, estimated-tax checklist or security questionnaire. Glossary definitions help clarify unfamiliar vocabulary. Articles remain shorter reads focused on one specific working question.

Common questions

Which guide should I read for a foreign-owned US subsidiary?

Start with the US-subsidiary guide for the overall tax and accounting map. Use the month-end guide for the close sequence and the international-returns guide for the reporting questions.

Does every guide include a downloadable template?

No. Four topics have dedicated download pages: the prospective IRS calendar, month-end close, estimated-tax work and the security questionnaire. Other guides link to relevant definitions or related methods.

How do I assess whether a guide applies to my engagement?

Check its scope, jurisdiction, year, framework and cited instructions against the actual facts. The responsible professional determines the treatment; the guide organizes the reasoning and work steps.

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