Importing file by year and period
Before importing, make sure these conditions are met:
- The file should contain the year and period columns. The names of the columns should match the input in the Import File tab.
 - The Year should be in the YYYY format.
 - The Period should be
			 consistent with the Period Type. 
			 
Example:
- Months: 1, 2, 3, ... up to 12 only
 - Weeks: 1, 2, 3, ... up to 52
 - Quarters: 1, 2, 3, 4 (up to 4)
 
 
To import a file by year and period: