Yes, you can still file a missing Form 8606 for 2018 on a standalone basis, meaning that you can file it without amending your tax returns. There can be a penalty of $50 for not filing Form 8606 on a timely basis, but the penalty can be waived if you can show reasonable cause for not filing.
Please see IRS Form 8606
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
