I filed my 2019 taxes I owed money, the covid-19 stimulus that will be sent out does the IRS have my routing #/checking acct # for the refund electronically?

if you provided it on either the 2018 or 2019 tax return (or you are on social security) then high probability they have it.

otherwise , you'll get a paper check 2-3 weeks later is what i am reading (figure end of April ish)

either way, the law requires the IRS to send you a letter confirming the size of your rebate 

I do not remember if when I filed if it asked form my routing number or checking account number as I paid by credit card, is there any way I can find out?