Here is the background before the questions. I moved to Germany in 2016 with my wife from the US and received a residence permit. The language requirement was waived because I had a university degree. When I renewed my US passport in 2018 I had to get a new permit valid till April 2021. In 2019 my wife and I split and I moved back to the US. We're not yet divorced but soon will be (I filed in Texas). Lately I've been thinking that I would like to live back in Germany for either part of the year or a year off and on. My question is, what would be involved in renewing the permit? Would I have to simply re-register my new residence in Germany and then apply for a renewal? Would they not like that I've lived now 9 months outside the country? What about language requirements? I was probably A2 when I left, seems to me they said I needed B1 for a permanent card, but would I be able to apply for another temporary? If anyone has any thoughts or similar experiences it would be greatly appreciated.
I got a niederlassungserlaubnis for a short time, and I am planning and changing jobs. possibly to another state. NRW to BadenWurt. is most likely.
its the first time I do that in Germany so I am confused about what to do.
whom should I inform? any special procedure I should go through?