If you did not set up a direct debit with your filing then there should have been a 1040-V in your paperwork to mail in a payment if the online direct pay will not acknowledge your filing yet.
Here is a blank form (with instructions) you can fill in and use : https://www.irs.gov/forms-pubs/about-form-1040-v
Check your state's web site for their payment options if needed.
