Cant take out of the back seat of my toyota vios 2012

The main battery is under the seat!
The vehicle cannot function without a main battery!

You can have several areas where the problem lies.
The problem can be the main switch (driver's side door panel). It is rather easy to take out the switch, it just unclips from the armrest, and make sure all the wires are OK. The power for the motor goes from this switch to the other switches, so if the motor does not work from the main switch, chances are this is where the problem is.
The best is to take it to an auto electrician, because wiring on the window motors is rather intricate, not easy if you don't understand how they work.

inside the fuel tank ,lift back seat access panel its under their

Where is the cigarette fuse 08 toyota vios?

On these case go with the solved problems related to these issue.

Click the link below and follow the procedure:-----
1994 Lexus GS300: Power seat will not go back? http://howtobyme.blogspot.in/2012/05/1994-lexus-gs300-power-seat-will-not-go.html

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1997 Toyota Avalon: Power Seat will not Move back? http://whatisbyme.blogspot.in/2012/05/1997-toyota-avalon-power-seat-will-not.html

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1998 Chevrolet Corvette: Power Seat Control Now Working? http://schematicsdiagram.blogspot.in/2012/04/1998-chevrolet-corvette-power-seat.html

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Power seat will not go Forward http://repairhelpcenter.blogspot.com/2012/10/power-seat-will-not-go-forward.html

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Replacing power adjustable bucket seats to both heated and cooled seats?

http://schematicsdiagram.blogspot.com/2011/12/replacing-power-adjustable-bucket-seats.html

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Volvo Seat Removal with Heated Seats? http://schematicsdiagram.blogspot.in/2012/07/volvo-seat-removal-with-heated-seats.html

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How to Remove Rear seat on Rover 600? http://repairhelpcenter.blogspot.com/2012/01/there-are-3-10mm-bolts-at-back-of-seats.html

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How to remove Seat? http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-seat-on-acura-integra.html

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These will help.
Thanks.

if going backward is working,and foward is not,, easy
,1st determine what is defective-so u know what to replace/repair-2 things only ,[1-switch or 2- motor under d seat]
by presing the backward swicth,, you can hear the sound of the motor running and u can see the seat is going backward...
1-now by pressing the foward switch, and you hear the motor running but not that strong like the rear ..and the seat move an inche /a little and stop,,.then u have a defect weak motor,
2- now by pressing the foward swicth and u dont hear any motor running then the switch is most likely defective
defective switch -repair- spray contact cleaner,remove cover switch,penetrate inside
defective motor-repair-remove motor replace inside carbon,,.chiepest way not to spend to much money..
i suggest even once a month,lubricate all power seat/even not powerseat/,door hinges/.trunk door/.power antenna./ .by spraying lubricating oil,. for maintanace,..you can save a lot..

probably an activated inertion switch/ sensor from the collision
reseting the ecm with a scanner may reset it

i think my new 2012 toyota corolla back seat seat belt are put in incorrectly from factory.

the right belt clip buckle clip says"Center" when it should be right, and the center is the right. so when i buckle the back seat belts they are kinds crossing each other . Why ? any suggesions?

If it's not specified in the owner manual, and if it's not already been replaced, 90,000 miles (144,000km) is probably the longest you should wait before replacing it.

On rear seat, remove it by lifting it up, then look down there for the missing hook or belt. When replacing the seat, you have to insure all the straps are on the seat before pushing in and down to replace the seat. It just pulls up and pushes down.