Trunk will not open on 2011 regal

The manual says there is a touch pad under the emblem.

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=12

There is an Emergency release inside the trunk if you can reach in from the back seat. This page refers

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=46#manual

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=12

..

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Best Manuals

Check the rear compartment lid unlatch relay in the under hood fuse box . The open switch is an input to the BCM - body control module , when pushed the BCM applies B+ voltage to energize the relay sending B+ voltage to lid latch motor opening the trunk . If not the relay the BCM may be at fault . May have DTC'S - diagnostic trouble codes stored .

It is most likely the latch assembly that is the problem, they are very prone to this, the whole thing is sold as one unit from the GM dealer.

If that model has a fold down section of the rear seat back, the manufacturer normally installs an accessible manual boot release tab in the vicinity of the fold down seat section just inside the trunk compartment.

If there is no fold down seat in that model or no manual boot release inside the trunk area, the rear seat needs to be removed so that you can access the trunk from inside the car.

Do you have a button on the dash, or do you have a lever on the floor ?

Do you have a button on the trunk itself? Mine wont open from inside car, but I have a 2011 checy cruze, and theres a button under the trunk, that pushes in and it opens

Yikes! You may need to remove the rear seat of the vehicle and trip the trunk latch from the inside.

I suspect you broke a torsion spring in the trunk. This can be replaced by you, but you won't be happy if it snaps you.

There is a switch in the latch assembly, the terminals could be corroded or the entire latch may need replacing.