Statement:
In Belgium, the tax system is more complicated than in United Kingdom

In the Tax Competitiveness Index rating Belgium holds position #23 2021 out of 37 and United Kingdom is #22 out of 37 2021.
Position of Belgium is worse than position of United Kingdom.

Referencies:

  1. Tax Competitiveness Index 2021 by Tax Foundation
    The countries in the rating sorted by 'Overall Score' in descending order.
    Belgium 'Overall Score' value is 61.6
    United Kingdom 'Overall Score' value is 61.8