The government lacks object permanence. Once they send the letter and it arrives, do NOT return it or the government will remember that you owe taxes for your vulva-scented candle scheme that went tits up because Gwyneth Paltrow, that bitch, stole your idea when you mentioned it in passing at the lip-thinner emporium. Just burn it like your stock of 10,000 candles, and the government will be none the wiser
You fool! Capitalize everything except irs. It signals they are not worthy of capitalization and, by extension and though Him, you are not capitulating.
If it's important they send with registered mail. By that point, they are telling you, not asking you.
I think it is in your best interest to read what they are sending so you can at least prepare for what's next.l, such as the inevitable lein on your house, seizure of your bank account, or getting your paycheck withheld.