File as soon as possible. If you owe federal income tax, you should file and pay as soon as you can to minimize any penalty and interest charges. There is no penalty for filing a late return if you are due a refund.
Penalties and interest may be due. If you missed the April 15 deadline, you may have to pay penalties and interest. The IRS may charge penalties for late filing and for late payment. The law generally does not allow a waiver of interest charges. However, the IRS will consider a reduction of these penalties if you can show a reasonable cause for being late.
Pay as much as you can. If you owe tax but can’t pay it all at once, you should pay as much as you can when you file your tax return. Pay the remaining balance due as soon as possible to minimize penalties and interest charges.
Installment Agreements are available. If you need more time to pay your federal income taxes, you can request a payment agreement with the IRS.