🇬🇧 UK🇺🇸 USA
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UK + USA BUSINESS TAX & COMPLIANCE

Start your business.
Know what comes next.

Clear guidance. Real next steps. Explore UK and US taxes, registrations, filings and compliance.

🇬🇧 United Kingdom →🇺🇸 United States →
Different
countries.
Same goal.
Your success.
⌂Start a BusinessChoose structure▣Business TaxesFederal, state, local▤Returns & FilingKnow what to file✓Stay CompliantDeadlines & renewals⌖By LocationLocal obligations👤Get Professional HelpRelevant specialists

Explore our tax practice areas

Move from understanding a tax to calculating, practising, filing and getting help.

🇬🇧

United Kingdom

View all UK tax topics →
Self Assessment
Self AssessmentIncome tax & SA100→
Corporation Tax
Corporation TaxCT600, rates & reliefs→
VAT
VATRegistration & returns→
PAYE & Payroll
PAYE & PayrollEmployer obligations→
🇺🇸

United States

View all US tax topics →
Federal Tax
Federal TaxIRS federal obligations→
State Tax
State TaxState taxes & filings→
Sales & Use Tax
Sales & Use TaxRates, nexus & marketplace→
Local Tax
Local TaxCounty, city & districts→
PRACTICE CENTRE

Learn the return by doing the return.

Work through realistic CT600, VAT and Self Assessment scenarios from source documents through computation, field validation and a worked answer.

Case filesFull return structureField explanationsValidation
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CT600 PracticePRACTICE MODE
Company detailsHarbour Design Ltd
Accounting period1 Apr 2025 – 31 Mar 2026
Next stepReview accounts and tax adjustments →

Business tools & calculators

Serious computation tools where the verified rules support a deterministic answer.

View all tools →
VAT Calculator
VAT CalculatorOpen the calculation or checkerUK→
Corporation Tax
Corporation TaxOpen the calculation or checkerUK→
Personal Tax
Personal TaxOpen the calculation or checkerUK→
Sales Tax
Sales TaxOpen the calculation or checkerUSA→
Economic Nexus
Economic NexusOpen the calculation or checkerUSA→
Filing Calendar
Filing CalendarOpen the calculation or checkerUK + USA→
Useful products for business tax record keeping office
Hand-picked, context-relevant Amazon UK searches. As an Amazon Associate ReturnDeck may earn from qualifying purchases.
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ScanSnap iX1600 document scanner
ScanSnap iX1600 document scannerDigitise receipts, invoices and tax records.Check options on Amazon →
receipt organiser business expenses
receipt organiser business expensesKeep paper receipts together before bookkeeping or scanning.Check options on Amazon →
Leitz lever arch files
Leitz lever arch filesKeep accounts, VAT and payroll records organised.Check options on Amazon →
Brother QL-800 label printer
Brother QL-800 label printerLabel files, archive boxes and business records.Check options on Amazon →
Fellowes Powershred 12C cross-cut shredder
Fellowes Powershred 12C cross-cut shredderDispose of confidential business records securely.Check options on Amazon →
Products are selected for relevance to the task, not because they affect ReturnDeck tax guidance. Availability and pricing can change on Amazon.
A simpler way to stay compliant✓ Official sources✓ Location-specific✓ Independent information✓ Tailored to your business
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