Hi Nazia Rafiq,
Where a business’s taxable supplies reach the VAT registration threshold, they must notify HMRC.
Exports of goods may be zero-rated supplies with VAT at 0% applicable where the conditions in notice 703 have been met.
VAT on goods exported from the UK (VAT Notice 703)
Zero-rated supplies are taxable supplies and count towards the UK VAT threshold.
Please refer to the registration guidance here:
Register for VAT
Thank you.