Paperwork and public services
Taxisnet (tax login)
In short
The login codes you use to enter the tax office website.
With your Taxisnet codes you enter myAADE and can see your declarations, debts and tax assessment notices.
If you forget them, follow the recovery instructions on the AADE system.
Be careful: AADE never asks for your codes by email or text message. If someone asks for them, it is a scam.
Official source: AADE (Greek tax authority)