Tax calculation is different from overdue amount to pay

I had to amend my figures for 2021-22. The tax calculation said I owed £ 55.40 - however, when I wanted to pay, on the self assessment page it said that I was £ 133 overdue. I do not owe any money for earlier years, so I do not understand this. What am I to do? I am, of course, willing to pay but only the amount that is stipulated in the tax calculation.

Hi,

Please contact our Self Assessment team as we would need to access your record to check why there is difference in the figures. 

Self Assessment: general enquiries

Thank you.