$taxRate = CRM_Core_PseudoConstant::getTaxRates();
// display taxTerm for priceFields
$invoiceSettings = Civi::settings()->get('contribution_invoice_settings');
$taxRate = CRM_Core_PseudoConstant::getTaxRates();
// display taxTerm for priceFields
$invoiceSettings = Civi::settings()->get('contribution_invoice_settings');