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Checking your customers' EU VAT and UK EORI numbers from code, without treating an outage as "invalid"

Checking your customers' EU VAT and UK EORI numbers from code, without treating an outage as "invalid"

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3 min read
BIR Compliance Checklist for Growing Philippine SMEs: Monthly, Quarterly and Annual Forms

BIR Compliance Checklist for Growing Philippine SMEs: Monthly, Quarterly and Annual Forms

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5 min read
German Income Tax Calculation in JavaScript

German Income Tax Calculation in JavaScript

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4 min read
1099 Self-Employment Tax, Explained for Freelance Developers

1099 Self-Employment Tax, Explained for Freelance Developers

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4 min read
The Flat Rate VAT Scheme: When It Saves a Freelancer Money (and When It Doesn't)

The Flat Rate VAT Scheme: When It Saves a Freelancer Money (and When It Doesn't)

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3 min read
When a B2B Customer Won't Give You a Valid VAT Number

When a B2B Customer Won't Give You a Valid VAT Number

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10 min read
Cash Accounting vs Standard VAT Accounting: Which Suits a UK Freelancer?

Cash Accounting vs Standard VAT Accounting: Which Suits a UK Freelancer?

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3 min read
Building an Audit-Ready Hour Log for STR and REPS (A Practical Engineering Approach)

Building an Audit-Ready Hour Log for STR and REPS (A Practical Engineering Approach)

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3 min read
W-2 Box 12 Codes TP and TT: What a Payroll Export Needs for Tax Year 2026

W-2 Box 12 Codes TP and TT: What a Payroll Export Needs for Tax Year 2026

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3 min read
Verifying vatnode Webhook Signatures (HMAC-SHA256)

Verifying vatnode Webhook Signatures (HMAC-SHA256)

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11 min read
How an AI agent can e-file a tax return

How an AI agent can e-file a tax return

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1 min read
Why VIES Says a Valid VAT Number Is Invalid

Why VIES Says a Valid VAT Number Is Invalid

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7 min read
UK VAT Rates Explained: 20%, 5%, 0% and When Each One Applies

UK VAT Rates Explained: 20%, 5%, 0% and When Each One Applies

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3 min read
VAT Calculations Across Europe: Handling Multiple Tax Rates in Code

VAT Calculations Across Europe: Handling Multiple Tax Rates in Code

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5 min read
UK PAYE vs US Withholding: A Developer's Guide

UK PAYE vs US Withholding: A Developer's Guide

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5 min read
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