After you file

Thank you for replying! I did work as an independent contractor for a few months last year and I checked schedule 3 line 12e and it said 98. I logged into the IRS make a payment portal and it said $0 is owed. Is the IRS make a payment portal where I’m supposed to pay it or is it somewhere else? Sorry for asking more questions! The $0 owed has me thrown off 😅