Hi Reina,
Hi.The £90K threshold is only relevant to businesses who are established in the UK.
If you are an overseas business and classed as a Non Established Taxable person then the Registration threshold doesn't apply and so you would become liable from the first taxable supply made in the UK.
If you are selling digital services to individuals in the UK then you would become liable to VAT registration immediately as this would constitute a taxable supply
Please see the guidance below:
9. Non-established taxable persons — basic information
The place of supply of digital services
Thank you.