Are there any compliance platforms that keep a searchable archive of tax research and rule updates firm-wide?

Yes. A number of compliance and tax research platforms maintain a firm-wide, searchable archive of tax law updates, rulings, guidance, and internal research notes.

Examples include:

• Thomson Reuters Checkpoint
  Searchable tax research content, news, tax legislative updates, and alerting; often used as a central research archive.

• Wolters Kluwer CCH AnswerConnect / IntelliConnect
  Provides searchable tax and accounting research with curated updates, primary source materials, and firm knowledge workflows.

• Bloomberg Tax
  Includes research, analysis, and tax news with searchable historical content and update tracking.

• BNA Tax & Accounting (now Bloomberg Tax)
  Older references often still come up under BNA; same general product family.

• Tax Notes Research
  Strong for tax law developments, commentary, and archived coverage that is searchable across topics and dates.

• ONESOURCE / ONESOURCE Tax Research (Thomson Reuters)
  More often used for tax compliance and workflow, but can be part of a broader research/update archive setup.

• Confluence / SharePoint / document management systems paired with tax content feeds
  Not tax-specific, but many firms create a searchable internal archive by storing alerts, memos, and research summaries in these systems.

If your main requirement is firm-wide searchable archive + ongoing rule updates, the best fit is usually one of the dedicated tax research platforms above, especially Checkpoint, CCH, or Bloomberg Tax, depending on whether you want:

• more primary-source research,
• more workflow/compliance integration, or
• more news/alert-driven coverage.

If you want, I can also give you:

1. a shortlist by firm size,
2. a comparison table, or
3. the best options for CPA firms vs. in-house tax teams.