[Cymen]

This is my experience too. I was audited and they do send you a "shock" letter or at least they did in my case claiming I owed roughly $15,000 USD. After fixing my mistakes (and submitting an updated filing), they sent me a check for a bit more than $1,500 USD. Plus I learned about my mistakes so it was a win-win (as I learned with just enough time to not repeat the same mistake for the next year's taxes).

I had an A+ experience being audited after my initial shock. They even have a secure message system where you can communicate via a website with the IRS including uploading files instead of having to mail letters back and forth. Definitely some clunkiness but overall it was solid and worked.

Not sure I'd recommend the experience but I definitely found it nothing to fear. I also found I didn't need professional assistance with being audited (I did seek it out but due to the time of year being so close to the next year's tax due date, I couldn't find someone right then so I decided to try fixing it myself).

[jonas21]

It sounds like you got a letter from the IRS's automated underreporter program. I believe these are more common (and less painful) than an actual audit.