Add punctuation: Please mark it job application your name and email it to Human Resources please state in your application that you allow us to save it for 1 year
A: Please mark it "job application - your name" and e-mail it to Human Resources (please state in your application that you allow us to save it for 1 year).

Add punctuation: They are my children said the Dew It is I who have nourished them with my tears I should think I am their mother the Rose Bush said
A: They are my children, said the Dew. It is I who have nourished them with my tears. I should think I am their mother, the Rose Bush said.

Add punctuation: This allows the intelligence of Windows to decide the correct software application to open your CSV file
A:
This allows the intelligence of Windows to decide the correct software application to open your CSV file.