I know the topic has been previously discussed, but it has been a few years and laws might have changed.
In 2020, I was approved for US Social Security disability and received backpay for several years (all of which I have lived in Germany). As far as I know, this pay is taxable in Germany. Hopefully, because of the progressive tax rate, it will not be taxed as if it all was received in one year. I have reached out to several "Steuerberater" on this subject that supposedly are very well versed on expat taxes, but haven`t been able to find one yet willing to do the tax declaration for me.
I appreciate any referrals or just experiences on the topic. Thank you.