When you create a new account, Solo will automatically generate all the tax periods for the current financial year. However, you can still access the tax periods for previous financial years. Here's how:
Import your previous years transactions into Solo. You can do this by connecting your bank or uploading a transaction file. You can retrieve up to 2 years (730 days) of transaction history when connecting your bank - apart from ASB, who only offer 90 days in their mobile app. For transactions you can import a transaction file from your bank.
Categorise an income transaction for the previous financial year.
As soon as you categorise an income transaction for the previous financial year all of the tax periods for that year will appear in Solo.
What if I only have Schedular Payment income?
Schedular Payment income is synced from IRD into Solo via the Pre-taxed income feed. The pre-taxed income feed will automatically sync all data for the previous 2 tax years. If you do not have any categorised transactions in Solo you might need to categorise a transaction (e.g. for 1c) so that the pre-taxed income appears:
Manually create a 1 cent transaction for the previous year
Categorise the transactions as Self-employed Income.