Hello and welcome to the site. Thank you for your question. I am sorry to say but online filing of accounts is not yet available for LLPs. You will have to file paper accounts. I would like to refer you to Companies House page that confirms it and also like you to read tips to avoid rejection of paper accounts. The link is here
Here is a checklist for completing annual accounts
Here is a link for accounting requirements for LLPs
I hope this is helpful and answers your question.
If you have any other questions, please ask me before you rate my service – I’ll be happy to respond.
I know your question was relating to filing of LLP accounts with Companies House and not filing of tax return with HMRC. The other expert gave you a wrong answer to your main question. Although not part of your question he has stated that LLP partners must file their tax returns individually. This again is an incomplete answer. The complete answer is .. The LLP should file a Partnership Tax Return. The Partnership Tax Return includes a ‘short’ Partnership Statement on pages 6 and 7 for summarising the profits, losses or income allocated to the partners. Fill in this or the ‘full’ unabridged Partnership Statement, as appropriate, and then provide each partner with the information they need to fill in their personal tax return. More information on this can be found in Partnership Tax Return Guide here