|re: "I have a spreadsheet (Called "Expenses") with 3 (A,B,C) tabs."|
I assume that you mean you have workbook called "Expenses" with 3 sheets named A, B and C.
1 - Press Alt-F11 to open the VBA editor.
2 - In the left hand pane, Double Click the word "ThisWorkbook"
3 - Paste in the following code
Whenever you Print the workbook, the code will "intercept" the Print command and run, printing every sheet in the workbook.
Private Sub Workbook_BeforePrint(Cancel As Boolean)
Application.EnableEvents = False
For shts = 1 To Sheets.Count
Cancel = True
Application.EnableEvents = True
Posting Tip: Before posting Data or VBA Code, read this How-To.