If I filed for an installment agreement online to I need to mail in the request paperwork?

Do I need to mail in a check for the first payment? I am not quite sure how this works.

posted

If your payment plan has not yet been approved, send in a payment before the due date of the return with the voucher. It can take up to 30 days for the IRS to accept your plan, and the IRS will not honor the agreement if the 1st installment is not received by 4/18/17.

You can also pay on the IRS website directly. https://www.irs.gov/payments

Note: Your tax return may be accepted in 24-48 hours. This not the same as having your installment plan accepted.

https://www.irs.gov/individuals/payment-plans-installment-agreements