So... is a solution to this:  wait until after 5/17 to efile a Texas return.  At that point, will the date be advanced such that extensions and returns filed after 5/17 by non-Texas states resolve the date issue?  In other words, returns filed after 5/17 will have payment dates up to 10/15.   I guess we just wait and see.  There is no rush to efile a return that has a balance due.