Tax Return Services

Sapphire Info Solutions provides end-to-end tax return preparation for UK accounting firms, covering the full range of personal and corporate tax compliance. Our qualified tax team handles Self-Assessment Tax Returns (SATR) for sole traders, company directors, landlords, and individuals with multiple income sources — ensuring every return is accurate, complete, and filed in line with HMRC requirements.
For limited companies, we prepare Corporation Tax Returns (CT600) including full tax computations reconciled to the statutory accounts, capital allowances, R&D tax relief claims, and loss relief where applicable. We also support Capital Gains Tax calculations, dividend and director remuneration reporting, and Partnership Tax Returns (SA800 and SA104).

Every return is prepared using your firm's existing software — TaxCalc, IRIS, CCH, Digita, or Sage Taxation — with a mandatory two-level quality review before delivery. Our standard turnaround is 2–3 working days from receipt of complete information, ensuring your firm never faces a deadline risk due to preparation delays.

What We Deliver:
• Self-Assessment Tax Returns — all client types (SA100, SA800, SA104)
• Corporation Tax Returns (CT600) with full computations
• Capital Gains Tax calculations — including 60-day CGT reporting
• R&D tax relief and loss relief computations
• Dividend & director remuneration income reporting
• Works with TaxCalc, IRIS, CCH, Digita, Sage Taxation & more
• 2–3 working day standard turnaround
• Two-level quality review on every return
• ISO 27001 & ISO 9001 Certified | GDPR Compliant