Yes, you can still file a 2023 tax return, although you can't do it online. You will need to buy a copy of Turbotax 2023 on CD or as a downloadable file, either from Intuit or from a reliable third party vendor that still sells the 2023 version. You will also have to print and mail your return, since you can't e-file prior year returns.
(Remember, turbotax online can only prepare a 2024 return. Don't try and prepare a 2023 return or add your 2023 information to your 2024 return.)
If you owe taxes and file late, the penalty is 5% of the amount you owe for the first 5 months, and then about 1% penalty plus interest per month after that. However, if you are expecting a refund, there is no penalty for filing late in most cases.
