Sources connected to Tom tell TMZ ... Katie's contention is baffling, because he had "no idea" she was about to file for divorce. As the sources told us last week, Tom was "blindsided" by the filing.

We've also learned ... Katie claims in her divorce documents that both she and Tom have been residents of New York for "at least 2 years." Katie, who filed in NYC, must establish legal residency in NY in order for the court to have jurisdiction -- something she wants because New York courts are more likely to grant sole custody of Suri -- something she desperately wants.