diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index af83083e308..5bda447f368 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -2150,4 +2150,6 @@ DatabasePasswordObfuscated=Database password is obfuscated in conf file
 DatabasePasswordNotObfuscated=Database password is NOT obfuscated in conf file
 APIsAreNotEnabled=APIs modules are not enabled
 YouShouldSetThisToOff=You should set this to 0 or off
-InstallAndUpgradeLockedBy=Install and upgrades are locked by the file <b>%s</b>
\ No newline at end of file
+InstallAndUpgradeLockedBy=Install and upgrades are locked by the file <b>%s</b>
+IfYouUseASecondTaxYouMustSetYouUseTheMainTax=If you want to use a second tax, you must enable also the first sale tax
+IfYouUseAThirdTaxYouMustSetYouUseTheMainTax=If you want to use a third tax, you must enable also the first sale tax