I need to cancel my scheduled electronic tax payment.

[Rachel_W]

Did you already efile your return?

[bluedeb · Accepted solution]

If your return was filed & accepted, To verify the date that Federal funds will be withdrawn from your account, confirm that funds have been transferred, or cancel the transaction up to 48 hours before the date you designated the funds to be debited, call the IRS at 1 (888) 353-4537.

If you have a state payment you would need to contact your state tax agency, 

[Bob1150]

I would like to cancel my electronic State Tax Payment

[bluedeb · Accepted solution]

@Bob1150  If your return has been accepted you cannot change it.  You would have to contact your State's Taxing Authority to see if they would cancel your payment.