Considering the situation described above, the latest Brianna can file an amended return to correct the originally filed 2019 return and claim the credit is "<u>March 1, 2023</u>."
This is because, according to Internal Revenue Service, an amended return can be filed either within 3 years after the date a person filed his original return or within 2 years after the date the person paid any tax owed, whichever comes later.
Therefore, given that Brianna filed her original return on March 1, 2020, and paid her tax owed on April 15, 2020, the latest she can file an amended return to correct the originally filed 2019 return and claim the credit is either March 1, 2023, or April 15, 2022.
However, since March 1, 2023, comes later, the latest time she can file is "<u>March 1, 2023</u>."
Hence, in this case, it is concluded that the correct answer is " <u>March 1, 2023</u>."
Learn more about tax returns here: brainly.com/question/2135349
