What can I provide as proof of income for my Workcation DTV application if I don't have a tax return yet?

In your situation, where you are applying for the Workcation DTV in February but won't have a completed tax return until April, you can consider providing alternative documentation to demonstrate your income. One suggestion is to present your unique taxpayer reference number from HMRC, which might be accepted as proof of your self-assessment status. Additionally, you can supply contracts for your freelance work, highlight relevant transactions on your bank statements that show your income, and perhaps provide a cover letter explaining your circumstances. Including a CV or portfolio that outlines your work can further strengthen your application.