YOU SAID:
I am going to the store today
INTO JAPANESE
私は今日店に行く
BACK INTO ENGLISH
I am going to a shop today.
INTO JAPANESE
私は今日店に行くつもりです。
BACK INTO ENGLISH
I am going to go to the shop today.
INTO JAPANESE
私は今日店に行くつもりです。
BACK INTO ENGLISH
I am going to go to the shop today.
That didn't even make that much sense in English.