See here: https://www.coincashew.com/coins/overview-ada/guide-how-to-build-a-haskell-stakepool-node/19.-retire-your-stake-pool
You will need to wait for 2 epochs until the 500ADA pool deposit is returned to your pool’s stake address as a reward. Then you will need to withdraw it to your spending address. It’s all explained at the page above.
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