YOU SAID:
I haven't paid my taxes since 2012.
INTO JAPANESE
私は2012年以来私の税金を払っていません。
BACK INTO ENGLISH
I have not paid my tax since 2012.
INTO JAPANESE
私は2012年以来私の税金を払っていません。
BACK INTO ENGLISH
I have not paid my tax since 2012.
You've done this before, haven't you.