I need to import transactions older than the limit that exists in Quickbooks. I have a CSV of all transactions from my business bank account.

• I have manipulated it into the four column format of; date, description, credit, debit.
• I have removed all amounts that equal zero in the credit and debit columns.
• The date format is all dd/mm/yyyy. 
• I have removed the symbols *,-/ from the description column
• I have deleted all blank rows under the data just in case of any hidden characters.

This CSV document absolutely refuses to be imported. I can't think of anything else that would need to be fixed.