I filed my 2018 taxes and used direct debit to pay federal taxes.  I stupidly paid my 2019 with a debit card instead of using direct debit with routing number and account.

Will they go back to 2018 return for routing information or is there a way to provide that information.  I read that turbo tax had portal, but when I click on it, it just sends me to my 2019 return.  I don't see a way to enter it.  

Do I have wait until the IRS portal is finally up or can I do this through Turbotax?

Thanks