You can purchase 3rd party software and use it to report your self employment and residence status, see guidance here-
File your Self Assessment tax return online
that will allow you to submit your tax return online. If you choose to use this method, you have until 31 January 2024 to submit your 2022 to 2023 return.
If you choose a paper return, you must submit it by 31 October 2023. The link will provide a list of valid suppliers.