“…Instead of examining the determinants of purchasing APTS directly, another stream of studies provides some evidence about the reasons audit clients decide to dismiss or retain their incumbent auditors as their tax services providers (Ahn et al, 2021;Albring et al, 2014;Finley & Stekelberg, 2016;Lassila et al, 2010). Because SOX (2002) and SEC (2000SEC ( , 2003SEC ( , 2006 prohibited certain types of NAS and required more granular classifications of fees disclosure, public firms substantially reduced or terminated the purchase of some NAS, including tax services, from their auditors, to reduce negative reactions from investors and regulators (Abbott et al, 2011;Finley & Stekelberg, 2016;Lennox, 2016;Maydew & Shackelford, 2007) Furthermore, the ex-ante independence risk will increase the costs of retaining decisions.…”