Knowledgebase

Plain-English guides to UK tax — covering Income Tax, VAT, Corporation Tax, Capital Gains Tax, National Insurance, SDLT, PAYE, Inheritance Tax, and more. Every article references official HMRC and GOV.UK sources.

By the GoFile team — helping over 50,000 UK businesses file tax returns

Income Tax & Making Tax Digital

All 100 articles →
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Income Tax Knowledge Base

100 articles covering MTD, deadlines, penalties, allowable expenses, property income, tax bands, and more.
What Is Making Tax Digital? Personal Allowance Key Deadlines Allowable Expenses Property Income Payments on Account

VAT & Making Tax Digital

All 59 articles →
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VAT Knowledge Base

59 articles covering VAT returns, MTD for VAT, Flat Rate Scheme, international VAT, and more.
What Is VAT? VAT Return Boxes Explained Flat Rate Scheme Registering for VAT VAT Return Deadlines What Is MTD for VAT?

Corporation Tax

All 57 articles →
CT

Corporation Tax Knowledge Base

57 articles covering CT600 returns, capital allowances, R&D relief, dividends, directors, and more.
What Is Corporation Tax? Corporation Tax Rates The CT600 Tax Return Allowable Business Expenses Salary vs Dividends Filing Deadlines

Capital Gains Tax

All 48 articles →
CG

Capital Gains Tax Knowledge Base

48 articles covering property disposals, shares, crypto, reliefs, the 60-day report, and more.
What Is Capital Gains Tax? CGT Rates (2025/26) CGT on Rental Property 60-Day Property Report Business Asset Disposal Relief Private Residence Relief

National Insurance

All 37 articles →
NI

National Insurance Knowledge Base

37 articles covering NI classes, self-employed contributions, employer NI, state pension, and more.
What Is National Insurance? NI Classes Explained Class 4 NI (Self-Employed) Employer NI (15%) Employment Allowance NI & State Pension

Stamp Duty Land Tax

All 28 articles →
SD

Stamp Duty Land Tax Knowledge Base

28 articles covering residential and commercial rates, first-time buyer relief, surcharges, and more.
What Is SDLT? Residential Rates (2025/26) First-Time Buyer Relief Additional Dwellings (5%) Commercial Rates SDLT on Leases

Construction Industry Scheme

All 22 articles →
CIS

Construction Industry Scheme Knowledge Base

22 articles covering CIS registration, deductions, returns, gross payment status, and more.
What Is CIS? Deduction Rates Gross Payment Status Monthly Returns Reclaiming Deductions Verification Process

PAYE & Payroll

All 35 articles →
PA

PAYE & Payroll Knowledge Base

35 articles covering tax codes, RTI, payslips, statutory payments, P45s, P60s, and more.
What Is PAYE? Tax Codes Explained RTI Overview Statutory Sick Pay P60 Explained The P45 Process

Inheritance Tax

All 34 articles →
IHT

Inheritance Tax Knowledge Base

34 articles covering nil-rate bands, gifts, reliefs, trusts, probate, and estate planning.
What Is Inheritance Tax? Nil-Rate Band (£325k) Residence Nil-Rate Band The 7-Year Rule Business Property Relief Spouse Exemption

Tax Planning

All 20 articles →
TP

Tax Planning Knowledge Base

20 articles covering salary vs dividends, pensions, ISAs, business structure, and life-stage planning.
Salary vs Dividends Pension Strategies Business Structure Year-End Checklist Selling a Business Retirement Planning

R&D Tax Credits

All 15 articles →
R&D

R&D Tax Credits Knowledge Base

15 articles covering qualifying activities, the merged RDEC scheme, claims, and industry examples.
What Qualifies as R&D? Merged RDEC Scheme How to Claim Eligible Costs R&D in Software HMRC Enquiries

Tax for Landlords

All 18 articles →
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Tax for Landlords Knowledge Base

18 articles covering rental income, expenses, SDLT surcharges, CGT on property, and more.
Landlord Tax Obligations Allowable Expenses Mortgage Interest (S.24) CGT on Rental Property SDLT on Buy-to-Let Rent-a-Room Scheme

Making Tax Digital

All 13 articles →
MTD

Making Tax Digital Knowledge Base

13 articles covering MTD for VAT, MTD for Income Tax, quarterly updates, and digital records.
What Is MTD? MTD Timeline & Roadmap MTD for Income Tax MTD for VAT Quarterly Updates Choosing MTD Software

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