Kalpana Patel

Hi I thought relief for finance cost was a maximum of £1000. However, reading the other posts it appears to be a flat rate of 20% of finance cost. For 2021-2022 and 2022-2023, I claimed a max of £1000 pa even though the mortgage interest on my buy-to-let property was £6528.61 and £6227.98 respectively. Would appreciate your advice on the correct computation and how I can claim on the error from previous years if so. Thank you.