Bladerunner

Hello everyone, I have done all the hard work (so far) been in contact with RiA and “registered” to receive my German pension which will start in April 2027, yes it’s a bit of a way off yet but I like to be prepared. My UK state pension will start in July 2027 however I can defer the start date if I choose to. My UK state pension is likely to be greater than the grundfreibetrag rate so I will have to pay German tax on my German state pension however, if I defer my UK state pension for one year my German pension will be based on that years “income” so below the grundfreibetrag rate. Would this assessment be applied for the following years? How is German tax calculated on the German pension, I’m assuming there is no tax free allowance if income is above grundfreibetrag so would I pay tax on the full amount irrespective on how much income (UK state pension) I receive or is there a sliding scale on income amounts? Is that why they ask for proof of UK income? My forecasts are UK state pension £11,487.84 PA, German state pension 5,200.00 € PA. It will probably change when I get to claim it but I like to plan ahead. Bonus question:- I’d like to set up a Euro bank account (shouldn’t have closed my German one) anyone had experience in doing that to make it easier to pay in and out?