Capital gain tax Interactive Brokers- Where to pay? Honduras-England-Germany?

Dear all,

i am from Germany, but without any residence there since 2013. Last year 2020 i first time invested through Interactive Brokers IB, which account was in England, now 2021 in Ireland.
Now i opened an IB account in Honduras whhere was mostly living since 2013, but i do not have a residence permit since 2020 there. It seems i fall under the category perpetual traveler, but i am not sure.

Have i have to pay Capital gain tax for 2020 and where?
I want to pay my taxes but i do not know where to start the process. Germany, England, Honduras?

Kind regards