Hi,
Blind Person's Allowance is applied in addition to your yearly Personal Allowance, you can find more information here:
Blind Person's Allowance
The amount of tax paid is dependant on individual, personal circumstances, if you would like to check your tax code or an explanation of the tax you are paying please contact us by webchat
or phone so we can review the information we hold, see link:
Income Tax: general enquiries
Thank you.