Made error when submitting a URL

What do/can I do? I have been trying to list for a long time and the last time I tried was years ago (yes it was my error that it was not listed).

This time I read the instructions and thought I had it right. In the middle of the night I work up and realised I actually changed my website address when setting up my website last (2 years ago).
The name I use, always have used and I have on everything (including email address) now directs to the new address (which is almost the same as the old address bar 1 character). So it was natural to type that in as I never use the other address.

Can I make a correction to my submission? I don't want to send another entry in case that is spamming.

You could try resubmitting the correct URL and add a small explanatory note in the description field explaining that you have resubmitted due to an error in the first submission, I doubt you would be accused of spamming for correcting an error.

If the old URL redirects to the new, we should notice anyway

You are right! and thank you for your fast replies.

I will resubmit with a little explanation.
Thanks again.