How to declare outside IR35 on self-assessment (MTD)

Accounting
1

As a side hustle, I’m a ‘sole trader’ / consultant towards a well-known educational provider. I send them around 10 invoices per year.

Example:

Invoice amount £1000
My client pays: £600 (deducting tax of 40%, no NI).

With my accountant gone into retirement and the pilot of Make Tax Digital, I connected my HMRC account to Quickfile. When I run a Cumulative Update for the first quarter, I see my £1000 invoice appear as ‘Turnover’ under the Income category.

QUESTION

How do I declare my consultant income that falls into ‘outside IR35’ on my self-assessment as I fear I face double-taxation without notifying them.

Any help is greatly apprecaited…

2

If your client is deducting tax, then presumably they have deemed you “inside IR35”. Do they provide a P60 or equivalent showing your gross income and tax deducted?