Some tax modules go back several years (T1 goes back to 2012). By default, the start screen only shows the current year and two prior years. You can change this. On a large screen, you can show all modules. On a small screen, you can hide what you don't need.
If you need to prepare multiple years of returns, in TaxCycle, you don't have to start with the earliest return and move forward. You can start with the current return and move back if you wish.
To update the prior-return with any changes in the current-year file:
You can set up TaxCycle to help you identify current-year and prior-year T1 returns when they are open together on screen.
A background texture containing the year shows when the option is checked (which it is the default). This texture shows up regardless of the colour you choose for your returns:
To enable or disable this background texture in TaxCycle T1: