After you file

Somehow the question was lost after the statement of a fact and a semi-colon.  My question is:  my return was accepted (last night); and I owe taxes and I filled out through TT Form 9465 for a payment arrangement.  TT had me print a Form 1040-V Payment Voucher.  Question: Do I need to send in a check with the Form 1040-V Payment Voucher now?  Or do I wait for the IRS to contact me?   OR do I set up a payment plan online without ANY contact with the IRS.  Steps please?