Tax reports on Koinly are priced separately for each year and are based on the number of transactions during that year.
Upgrading a plan
You can upgrade a tax report by paying the difference between the price you already paid and the price of the new plan. Note that this upgrade discount can only be applied when upgrading within 1 year from date of initial purchase.
Account-wide transaction limit
There is an account-wide transaction limit that is based on the total number of transactions in your account. This limit increases every time you buy a tax report (by the maximum number of transactions allowed by the report plan).
Why is a plan locked even though I have fewer transactions during the year?
This is most likely due to the account-wide transaction limit. If you exceed the base account limit of 1000 transactions, you have to purchase a plan that will increase the limit to cover the total transactions in your account. You can also increase the limit by purchasing reports for previous years.
Ex. If you had 10,000 transactions in 2018 but only 50 transactions in 2019 then you would need to either buy a Pro plan for 2019 that covers 10050 transactions or buy a tax report for 2018 first and then buy a smaller report for 2019.