Dirk T

Hi I am receiving a small German state pension on top of my UK state pension since Dec.2023.The German pension is taxable in Germany. I had a letter from the German Tax office (RIA) saying they won't tax me for 2023 since I am received my first Pension Payment in December 2023 and the tax year ends 31 of December the Taxable amount is too small. Do I need too fill in an Self Assessment for HMRC, or SA106?.Don't need too Declare the German pension.?