I have a retirement visa. My 90 day is due April 11. I am going to the US on April 10 for two weeks. Am I okay to wait till I come back from the US or must I do before I go?

I guess you are talking about the 90 day report?

You can only report late up to 7 day late, if you go in person.Why dont you just report by mail or today or tomorrow in person?

And don't forget the re-entry permit.

If you leave prior to being here 90 days, you don't need to report.

Your new report date will be 90 days after you return.

As mentioned, don't forget a re-entry permit.