The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Once the ClD
sees this is willful TAX fraud,
Breaking Bad Season 4, Episode 9

The theory is that
if you really TAX your brain,
The Big Bang Theory Season 10, Episode 22

Does your guy know the TAX code
and regulations in New Mexico?
Breaking Bad Season 3, Episode 11

Million times worse.
You're a TAX cheat.
Breaking Bad Season 3, Episode 9

No, we don't want to draw
any unwanted TAX attention.
Breaking Bad Season 4, Episode 3