if you did not pay the taxes at the time of filing your extension they are late. payment should have been made by 4/15/2019. you can go to IRS website and use the "view your account link" to check. if you didn't make the payment or otherwise have a balance due you can
1 go to IRS website and pay through your bank account or use a debit or credit card or
2 you can use direct debit if efiling or
3 mail a check with the 1040-V make sure your SSN is on the check along with your name, address, tax year
