The register
The register lists Tax Effective LTD in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Tax Effective Limited, number 10668328, incorporated 2017: 9 years of filings behind the name. Registered office: 2nd Floor, 42 Westbourne Grove, London, W2 5SH, W2 5SH. Its filed activity puts it in professional and technical services.
Holding a licence is the expensive, slow part done. For Tax Effective LTD the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.