If you do not owe or will get a refund for 2023, there is no penalty for filing late. If you owe tax due, your late filing penalties and interest have been adding up since last year's filing deadline, so get it mailed asap with your payment of the tax due as shown on the tax return and then expect a bill for the additional amount you will owe. You have also missed the chance to request an extension for 2024, so the same advice applies.
You can only file 2023 by mail. 2024 can be e-filed, but you will need to use "zero" as your AGI when you try to e-file 2024, since the IRS will not have a 2023 AGI in the system for you.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
