I submitted a 1040-SR using Turbotax E-File. I owed approx $500, printed the form for payment and have not yet made payment. A couple of weeks later, I noticed that I had put a number on the wrong line. I completed a 1040X on Turbotax and E-Filed. This resulted in approx a $1,600 refund (which is close to my normal refund for the past 25+ years.) Question is: Do I need to mail the $500 from the first submission, or do I hold off on that and wait for the refund. Once I have the refund, do I still owe the $500?