Today I went to a/ the department store with my mother and my daughter. We went there by car. I memorized where I had parked very carefully, because I often forget my parking place. After we had finished shopping, I was going back to my car, but I didn't know where to go in the car park. I walked around there for a while until I realized I was on the wrong floor. I should be more careful next time.

Hi Aya,

I made a few essential corrections to your spelling and fixed one preposition error. Other than that the rest of the changes I made were stylistic so that it flowed more naturally. All in all I'd say your original attempt was pretty good and definitely made sense, so keep up the good work. 

I hope the above helps.

Jason.

Please correct this. Thank you for your kindness.

* department store is two words

** I changed the parking floor sentence a little bit so it flows better.

*** until is spelt with only one 'L'.

**** careful is also spelt with only one "L'.

***** I also added the words "I guess" to the last sentence.  That's simply to reflect how people speak/ think.

take care!