Download P45 Part 1 Spreadsheet   Download P45 Part 1 Spreadsheet Always download and read the instructions before you populate your data into the spreadsheet.   Instruction for P45 Part 1 Spreadsheet ( Employer ) P45 Part 1 Spreadsheet document ( Employer )   Instruction for P45 Part 1 Spreadsheet ( Employee ) P45 Part 1 Spreadsheet document ( Employee ) Once downloaded, you should enter your data into the Spreadsheet and save it in a CSV format. Then select Upload CSV Data from the Tasking Zone to save the spreadsheet back to our server in a CSV format ready for eFiling