This sentence is correctly punctuated and capitalized.
The teacher offered to show us how to parallel park; we decided to ask Audrey Parker Nichols for help instead.
The first letter of the first word "The" is capitalized since it is the beginning of a sentence. The semicolon is used correctly to join two independent clauses. The names "Audrey Parker Nichols" are capitalized correctly, with each initial letter capitalized.Therefore, no punctuation or capitalization errors needed to be fixed in this sentence.