The new tax law is still a bit complicated, not many people understand how it will be implemented.
The tax has began on 1st of January of this year.
There is nothing complicated about the tax. You can make use of tax calculator for it.
Personal income tax calculatorsSince it is a new tax regime, we will begin to understand what fall into their taxable income and how those taxes will be collected with time. I don't know how they will tax earnings in Bitcoin that are sitting in private wallets or traded in exchanges when cryptocurrency is not regulated in Nigeria.
There is a reason the UK and EU want to people to disclose the addresses generated by their noncustodial wallets, there is no law like that in Nigeria yet.
The tax authority can request for people's information on exchanges that have license in Nigeria. There is work ongoing on this for effective way to more about people's transactions on exchanges.