There is a wide variety of supportive programmes for postdoctoral researchers even outside the University. Subsequently, you will find a list with an overview of these programmes (without claiming to be exhaustive).
The division for staff development of University Jena can help you to find a coach. Coaching programmes, that are particularly for academics, can be found amongst others at the website of Karriereberatung für Akademiker and i.b.s. human ressources. For a nationwide search you can also retrieve information from the following data base.
The student association ParaLegal provides free advice on legal issues.
Problems related to refugees and migration
International postdocs may also use the advisory services of Refugio e.V. and the Migrationsdienst der AWO, which is offered in various languages (e.g. English, Russian, Arabic). The association ParaLegal gives advice on legal issues.
Proofreading and Translation of Texts
Ms. Margit Pantke as well as Mathias Stolarz offer a proofreading service for scientific German texts. A database regarding the search for lectors can be found here. With regard to scientific English texts, proofreading services are amongst others offered by Modilingua and Englischlektorat. A database regarding the search for translators can be found here.
You can take professional legal advice for your income tax statement by, for instance, Jenaer Lohnsteuerhilfe e.V. or Vereinigte Lohnsteuerhilfe e.V. A list with tax accountants can be found here.