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. The bank feed can import transactions as far back as 365 days so you might also need to upload some transactions.
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?
If all your income is from Schedular Payments and therefore is imported in Solo via the IRD Feed. You can still access the previous financial year:
Manually create a 1 cent transaction for the previous year
Categorise the transactions as Self-employed Income.