When submitting your refund claim, you will need:

1. Original VAT invoices from your suppliers, stamped and signed.
2. Customs import declarations showing duty and VAT paid on imports.
3. Periodic VAT returns that document your output and input VAT calculations.
4. Bank payment proofs (SWIFT confirmations or bank statements) reflecting VAT remittances.
5. Declaration of use: a letter or schedule showing how the inputs relate to your taxable activities, to satisfy audit requirements.