Self-Assessment on French Salary

Hello, I arrived in UK this year and will be considered as resident for tax year 2024/2025. I will have to do a Self-Assessment after this tax year. My only income is a french salary (from my french employer): - Gross amount : 2643£/m - Social contributions : 608£/m (directly take on my salary) - Tax : 200£/m (directly take on my salary) So after that, my net salary is 1834 £/m Social contributions are composed by : health and pension contributions, deductible CSG, Non-deductible CSG. What will be the amount to declare during my self-assessment (in which field) and what amounts can I subtract (claim refief)? Indeed, I don't get the gross salary directly. (so paying tax on the gross salary seems strange to me...) It would be great to have the detail of which form will I have to fill and which fields. Thanks you in advance for your reply, TC

Hi,
As you will be tax resident in the UK for the whole tax year, your French employment income will be taxable only in the UK and declared in a self assessment tax return. You can request a certificate of residence at:
How to apply for a certificate of residence to claim tax relief abroad
The certificate can be given to the French tax authorities, so that your employment income does not have tax deducted.
Thank you