My Federal return was electronically accepted, but I owe and I need to write a check. Is there a document I print off to send with the check? I can't find instructions.

[AnthonyC]

Yes, you can print a Form 1040-V to send with your check payment (it should have printed with your pdf of return but you can also use the link below)

https://www.irs.gov/pub/irs-pdf/f1040v.pdf

You can also make a direct payment online to the IRS using your bank account (or a card payment) -

https://www.irs.gov/payments