If you underpaid your taxes, you need to pay the outstanding amount to the relevant tax office before the tax filing deadline. The annual deadline for most people to file their federal income tax return and pay any taxes they owe is April, 15th.
If you end up owing additional taxes with your return, you have various options to pay. You can pay by check, bank transfer or use your credit or debit card.
You may need to prepare a payment voucher and mail it to the IRS with a check or money order if you choose this payment method. If you choose to pay with a payment voucher, Sprintax will provide the filled out form for you. You will find detailed information about the method you have chosen in your instructions.
By law, the IRS may assess penalties to taxpayers for both failing to file a tax return and for failing to pay taxes they owe by the deadline that is why it is important to pay what you owe or what you think you might owe to the tax office by the deadline.