I'd suggest giving this article on Veverio a look before committing to anything. It walks through real use cases rather than just listing specs, which helped me picture how it would fit day to day. Quick read with useful detail: https://herbsttisch0k9.xobor.de/t2f1679475500-Automatic-Withholding-Tax-Credit-Monitor-Recover-Czech-Dividend-Tax-Faster.html