Back in the current year, enter the loss you want to carry back to the earlier two years via the
Carry Back Extension...
button, where you can enter the relevant amounts in the rows
Carry back to CY -2
and
Carry back to CY -3. Carry back to CY -2
must be populated before
Carry back to CY -3
becomes available. Therefore, if you have losses in CY -2, you will need to enter 0 so that you can enter the amount to set against CY -3. Please note that you can only offset a maximum loss of 2,000,000 in total against these earlier years. If you enter figures totaling more than 2,000,000 you will get an error message on closing the dialog box and will need to adjust the figures in order to continue.