Letter 6174 or Letter 6174-A
What is the Letter 6174 / 6174-A telling me?
This letter asks you to review your tax return to make sure that you correctly reported any cryptocurrency transactions you made.
What do I have to do?
You need to review your tax return to make sure you've included any cryptocurrency transactions you've made. If you reported everything correctly, you don't need to do anything. If you didn't report your cryptocurrency transactions, then you'll need to file your tax return (or an amended tax return if you've already filed) and mail it to the address shown on the letter.
Who should I contact if I have questions?
If you have any questions, you can contact the IRS using the contact information provided on the letter.