To use the price calculator:

1. Enter your return’s start date using the calendar in the Start Date column.
2. Enter your return’s end date using the calendar in the End Date column.
3. Review the version required for the return in the Version to Use column.
4. If you have to file for multiple tax years, click Add Row. The start and end dates will automatically update to the previous year.
5. If you have to file multiple corporations with the same tax year, or if you are filing the T106, T1134, T1135, E-Docs, Attach-a-Doc, RC4649, or Alberta AT1 (which are treated as separate tax returns), click Copy to duplicate the row.
6. If you have to delete a row, click Delete.

As you add more returns, the version shown in the Version to Use column may change. This happens because the calculator groups as many returns as possible under one version to give you the lowest price.