No, Actually the last date to submit the fee is now over, sorry to say. As per the official announcement, the last date to submit the fee was June 30, 2020. Now you can not submit your fee, but you may also get some kinda relaxation if you contact AIOU.
Here, is the information that How you can contact AIOU( AIOU Contact number | Phone Number [Whatsapp & Facebook group]). Just contact them and ask them to submit your fee after the due date, if there is a way they will definitely guide you otherwise you have to wait for next Autumn Semester.
If you still have any question then ask here, Ask a question about AIOU