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Business guides and resources

Guides, calculators and answers to your common tax and accounting questions.
VAT Services Stay HMRC-Compliant & Save Thousands

Business Structure

Sigma Chartered Accountants’ guide to business structures: compare sole trader, partnership, limited company & more to optimise tax, liability & growth.
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Making Tax Digital

Sigma Chartered Accountants’ Making Tax Digital (MTD) guide: requirements, deadlines, compliant software solutions, filing tips, and efficiency benefits.
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VAT Basics and Registration

VAT Basics and Registration

Sigma Chartered Accountants’ VAT Basics & Registration guide: VAT fundamentals, thresholds, application steps, deadlines, and compliance tips.
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Switching Accountants

Switching Accountants

Sigma Chartered Accountants’ guide to switching accountants: reasons, checklist, timelines, and expert tips for a smooth transition.
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