Most countries don't tax their citizens, only their residents. The most notable exception is the US. In the EU countries however you only need to pay tax if you are a resident there. More specifically in Italy:
If you live in Italy for more than 183 days in a year, or your life is centered in Italy and you are in the Population Registry: You must pay tax on ...
I'm Italian and I moved to the UK two years ago. As Italians, if we permanently reside in a foreign country we don't pay taxes on what we earn abroad. There are taxes to pay if you own a property in Italy, but that's a different story, of course. As citizens, if we plan to move abroad for longer than a year, however, the Italian law imposes that we sign up ...
Difficult question, with no simple answer.
It is also a question that belongs in
Assumptions: All participants
parents, children, mother and sister
are Italian citizens.
All Italians living outside of Italy are required to register themselves with the AIRE system
if this is not the case, do so before leaving the ...
Your claim for Italian Citizenship will be based on your marriage abroad
after 3 years abroad, this would have been possible
However as an Italian living abroad your spouse was required to register in the A.I.R.E system
where the registration of the marriage would also have be done
So problem 1, is to get the marriage reconised in Italy as a base for ...
The consulate make just a preliminary verification of autenticity of the documents and forward the request to the Interior Ministry (Ministero degli Interni). Since I don't think it is possible to apply twice, your wife should just communicate your new address in London to the Zurich consulate so that they can reach you whenever they have an answer.
Your income tax and old-age pension will be paid in Germany and will be deducted from your pay automaticly.
When leaving Germany you should apply for a Versicherungsverlauf, which will assist you when applying for a Pension in the future
see details inside in the first link below, togeather with other tips one what must be done after arrival in Germany
You have said you are "moving" from Italy to Germany. That makes things much simpler. (Rules are more complex if you live in one country and work in another.)
Your salary will be taxed in Germany. You will not be liable for tax on your salary in Italy, provided you register with AIRE.
You should pay contributions for old-age pensions in Germany.
The Consulate in San Francisco has a page of FAQs about AIRE.
One of them includes this statement:
Please note that the AIRE registration date cannot be retroactive.
Another one states that you must register within 90 days of arrival.
EDIT: I voted to close the question because there's another similar question: Do Italian Citizens living abroad have to ...