YES. After submitting an application online, print the declaration from your home page at Student Finance account, date, sign and send on the address that is written on it and/ or your Student Finance portal.
Along with declaration, you need to send an evidence that you are still working in UK (if you applied as EU migrant worker or family member of EU migrant worker).
Evidence could be for employed: payslips, P60, P45 (if you changed your job since last academic year). Evidence for self-employed: banks statements, Tax returns, invoices corresponding banks statements