Recently Self Employed - Alternative Documents

[Fragkon]

Dear all,

I am about to make an online application for British Citizenship via naturalisation online,
after having acquired EEA Permanent Resident Status since Sep 2014.
I have a question regarding the required documents for Self-employed applicants.
I was fully employed by a company until 31 May 2018. On the 30th of June 2018 I registered as self employed as I now work as a freelancer.

Since we are now in the 2018/19 Tax year I am unable to provide a self assessment return statement, therefore I was wondering what alternative documents can I provide in this case ? And are there any similar cases to mine?

Please note I have all my P60s, Payslips and finally P45 from the company I was fully employed until the end of May.

Any advice on the above would be really appreciated!

Many Thanks!