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Simply enter the total amount you're claiming — this will be deducted from your taxable profits automatically.
A couple of things to note:
- The AIA covers most capital purchases (equipment, machinery, fixtures, etc.) up to £1,000,000 per year
- You'll need to calculate the amount you're claiming yourself — TinyTax doesn't calculate this automatically
- Remember that accounting depreciation is a separate thing — it gets added back in the tax computation, and the AIA replaces it as your tax-deductible amount
We also have a guide that walks through the process step by step: https://www.tinytax.co.uk/support/guides/capital-allowances-aia