PULL THE BATTERY OUT OF IT ASAP!
If you didn't cut your motor off before it sucked in water then I would say it is going to be totaled out.
You need to pull the computer and place it in a ziplock bag full of rice, suck all the extra air out and set it somewhere warm or in the sun (sucks moisture out), replace the rice the next day and leave it again. drain everything motor, tranny, t-case, axles, etc. It's all going to have to be flushed out repeatedly. Interior will have to be pulled. Do not even think about putting the battery back in it or trying to start it for at least a week. Go through all the electrical terminals and connections you can and clean them. Clean out your throttle body, intake, etc. and DO NOT PUT ANY ELECTRICITY TO IT FOR A WEEK. Why a week? You need to let every single terminal/connection dry out first, if you got gauges or electric motors or computers wet and run electricity through them you could short them out and fry things (if it has not already happened).
I would hope for your sake you can get insurance to cover it and total it out if you hydrolocked the motor and fried the electronics, then buy it back from them and begin the rebuild process.
I learned that lesson the hard way in high school, luckily it was with a fourwheeler and an old Jeep and I killed the motor on both before they sunk. I had to unbuckle myself from the Jeep seat while underwater as I sunk it over the windshield, not my brightest move ever.
Good luck, and most importantly TAKE YOUR TIME going through everything before trying to fire it up again