Man pages matching name business::tax::vat::validation in section 3pm:

Business::Tax::VAT::Validation.3pm.en	debian 10 / libbusiness-tax-vat-validation-perl
Business::Tax::VAT::Validation.3pm.en	debian 11 / libbusiness-tax-vat-validation-perl
Business::Tax::VAT::Validation.3pm.en	debian 12 / libbusiness-tax-vat-validation-perl