Field 38: '10.5' does not match regex rule ^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$

Hi,
I am trying to import my xlsx file for products, the tax rate is showing problem
Field 38 : '10.5 ’ does not match regex rule ^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$
It is not accepting general number neither percentage. any suggestions?

Your rule matches something like 1234-56-78, 8 digits separated with 2 dashes. The regexp does not allow a decimal point.
Maybe you matched the wrong column?