Updated

Lindsay Lohan could be sentenced to nearly a year-and-a-half in jail if Judge Stephanie Sautner decides she violated her probation, TMZ has learned.

The computations are complicated, because Lohan has had so many cases. But based on the 120 day suspended sentence for shoplifting, time served under house arrest, and her prior DUIs, the actress could be thrown in jail for a long, long time.

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Lohan must be in court Wednesday to face the judge, and the judge has lots of questions, including why Lohan, 26, was a no-show nine times at the Downtown Women's Center, where she was performing her community service, TMZ reports.

And the judge will almost certainly want to know why Lohan didn't comply with the order to spend a minimum of four hours at a time when she showed up at the Women's Center.

TMZ first reported that Lohan was booted from the Women's Center because of all the problems and reassigned to the American Red Cross.

And one more thing.

The judge will almost certainly ask Lohan why she didn't meet with her shrink every Monday for one hour, as required by court order.  Lohan claims she did a bunch of therapy sessions by phone.

TMZ will be livestreaming Wednesday's hearing, which starts at 10:00 AM PT, so stay tuned.