Self Employed and Personal allowances

I am trying to fill out my self assessment as someone self employed. There isn’t an opportunity on the form to recover my £12750 tax free allowance so the calculation is ignoring this and asking me to pay more than I would expect- how do I fix this?

Hi BHolmes holmes,
Your Personal Allowances are given automatically in the calculation if you are UK tax resident and domicile.
Please review the full calculation at the end of the return to confirm.
Thank you.