irs.gov → sign in → ID.me
To login to your online IRS account, start at irs.gov.
The system will take you to ID.me which will log you in and authenticate you
and then forward you to the IRS secure site at https://sa.www4.irs.gov/ola/
ola = online account
What you can do at your online irs.gov account:
What you can NOT do at your online account is to file the 1040. For that, see Income Tax.
There are two payment methods:
If you pay by bank account you first create an ACH link to your bank account, using the two micro-payments method. Once that is set up you can initiate payments from your online IRS account.