Marriage allowance transfer

I have had a transfer in place for several years. I have just completed my self assessment for 24/25 and answered 'No' to the question about this as it said to do so as the correct reduced figure would be in the final calculation. But it's not - it's showing the full allowance so the refund is grossly overstated.

Hi,
If you transferred Marriage Allowance to your partner in 24/25, this needs be declared when completing your return to be accurately reflected in your 24/25 calculation.
Thank you.