I have lodged a 362 but its not allowing me to do a RA71 form to bring the data in.
Lodge a Form RA61 Request Review Date Report to check if you are the registered agent for the company.
If you are lodging a form soon after lodging the form 362, it may simply be a timing issue while ASIC records are being updated.
If ASIC happens to be having issues with their online services or the EDGE Mailboxes, ASIC can sometimes take a longer period of time to process and recognise that you are the Registered Agent for a company (Even though the Form 362 has already been accepted),
In this case, you can try the lodgement again at a later stage. Lodgements for the company will then usually work within an hour or so, or by the next morning at the latest.