No, you can't get an extension, but the IRS gives you plenty of time to amend a return that you filed.
Generally speaking, you have 3 years from the date you filed the return (or 2 years from the date you paid the tax due on the return — whichever is later) to file an amended return.
Here are a few examples for 2020 tax year returns:
- If you filed on January 31, 2021 (before the May deadline) and owed no tax, you'd have until May 17, 2024 to file an amended 2020 return.
- This is because returns filed on or before the May 17 deadline are considered to have been filed on the deadline.
- However, if you filed after the May deadline (say, on August 1, 2021), you'd have three years from that date to file an amendment (August 1, 2024 in this example).
- If you filed on March 21, 2021 and paid additional tax due on that date, you'd have until March 21, 2024 to file an amended 2020 return.
- This is because three years from the filing date (March 21, 2024) is later than two years from the payment date (March 21, 2023).
- If you filed on May 17, 2021 but didn't pay the additional tax due until March 31, 2022, you'll have until May 17, 2024 to file an amended 2020 return.
- That's because three years from the filing date (May 17, 2024) is later than two years from the payment date (March 31, 2024).