Hi Dyognes7256,
If we are collecting £309 in your current code, we make an adjustment in your tax code to collect this based on the tax band.
In this case you will be a higher rate taxpayer in Scotland so the tax restriction will be calculated at 42%.
The restriction is 737 which we will collect tax on at 42% so we collect £309.
If you think your tax code is incorrect you can contact HMRC so we can review this for you.
Self Assessment: general enquiries
Thank you.