What documentation is needed for R&D tax credits in engineering?

To claim R&D tax credits engineering, firms must maintain thorough documentation that proves qualified research activities. This includes detailed project records, timesheets, payroll data, technical reports, and design documents that show experimentation or problem-solving efforts. Supporting evidence like emails, prototypes, and testing results can also strengthen the claim. Properly organized documentation not only substantiates eligibility but also ensures compliance during audits, making it essential for engineering firms seeking to maximize their R&D tax credits engineering benefits.