since the 2017 returns can't be efiled (neither can the 2018 returns) there's nothing preventing you from mailing in your 2017 NY return (even though NY prefers efiling). since you owe on your federal, expect the iRS to bill you for late filing penalties, late payment penalties and interest. you can request abatenbt of penalties but not the interest. (usually the IRS will grant if this is your first time file
Failure-to-pay penalty is charged for failing to pay your tax by the due date.
- The late payment penalty is 0.5% of the tax owed after the due date, for each month or part of a month the tax remains unpaid, up to 25%.
- You won't have to pay the penalty if you can show reasonable cause for the failure to pay on time.
- 10 days after the IRS issues a final notice of intent to levy or seize property, the 0.5% rate increases to 1% per month.
- The penalty rate is 0.25% for each month or part of a month in which an installment agreement is in effect.
Failure-to-file penalty is charged on returns filed after the due date or extended due date, absent a reasonable cause for filing late.
- The failure-to-file penalty is 5% of the unpaid taxes for each month or part of a month that a tax return is late. The penalty won't exceed 25% of your unpaid taxes.
- If both a failure-to-file and a failure-to-pay penalty are applicable in the same month, the combined penalty is 5% (4.5% late filing and 0.5% late payment) for each month or part of a month that your return was late, up to 25%.
- The late filing penalty is calculated based on the tax that remains unpaid after the due date. Unpaid tax is the total tax shown on your return reduced by amounts paid through withholding, estimated tax payments, and allowed refundable credits.
- If after five months you still haven't paid, the failure-to-file penalty will max out, but the failure-to-pay penalty continues until the tax is paid, up to 25%.
- The maximum total penalty for failure to file and pay is 47.5% (22.5% late filing and 25% late payment) of the tax.
- If your return was over 60 days late, the minimum failure-to-file penalty is the smaller of $210 or 100% of the tax owed.