UK personal income statistics for tax year 2017-2018 have been released.

Women paid 27.2% of all income tax collected. Men contributed 72.8%. The female contribution has actually gone DOWN since the last time I checked -- tax year 2010-11 when it was 28.8%.

Calculated equivalently to the "wage gap" feminists never seem to shut up about (women earn 77 cents on the dollar compared to men), the "tax gap" is 1-(27.2/72.8) = 0.63.

You have to dig down into the spreadsheet file. Table 3.11.

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/895504/Collated_Tables_3_1_to_3_17_1718.xlsx

Here is the page with the overview:

https://www.gov.uk/government/statistics/personal-incomes-tables-31-to-311-316-and-317-for-the-tax-year-2017-to-2018

Keep in mind, women use MORE healthcare , generally outlive their husbands and draw his pension afterwards, and use MORE government services in general.