reports and charts

VAT Gap https://ec.europa.eu/taxation_customs/sites/taxation/files/vat-gap-full-report-2019_en.pdf

International tax evasion https://ec.europa.eu/taxation_customs/sites/taxation/files/2019-taxation-papers-76.pdf

Tax evasion Europe with corporate tax estimate https://www.socialistsanddemocrats.eu/sites/default/files/2019-01/the_european_tax_gap_en_190123.pdf

Italian report from MEF (ministry finance) http://www.mef.gov.it/documenti-allegati/2018/A6_-_Relazione_evasione_fiscale_e_contributiva.pdf