Docker Tax Collection Start Dates and Instructions

1st chunk of `content/includes/tax-compliance.md`

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> [!IMPORTANT]
>
> For United States customers, Docker began collecting sales tax on July 1, 2024.
> For European customers, Docker began collecting VAT on March 1, 2025.
> For United Kingdom customers, Docker began collecting VAT on May 1, 2025.
>
> To ensure that tax assessments are correct, make sure that your
[billing information](/billing/details/) and VAT/Tax ID, if applicable, are
updated. If you're exempt from sales tax, see
[Register a tax certificate](/billing/tax-certificate/).

Title: Docker Tax Collection Start Dates and Instructions

Summary

This section informs customers in the United States, Europe, and the United Kingdom about the dates Docker began collecting sales tax or VAT. It emphasizes the importance of updating billing information and VAT/Tax IDs to ensure accurate tax assessments and provides links to manage billing details and register for tax exemption.