<human>: Can you succinctly summarize the text in 1-3 sentences?

Looking for advice on what I need to put down as my legal residence when applying for a credit card. The issue I am running into is due to the fact that I do not live at my legal residence. I am a recent college grad that just began working on Capitol Hill for one of the senators from my home state. There is an odd tax provision called reciprocity that allows anyone who is a permanent resident of the state or district that the senator or representative that they work for to essentially, for state tax purposes, pretend that they still live in the state and not in DC. Therefore, I can still claim my parents' legal address as my own and pay state taxes from my home state instead of DC, an attractive option due to low tax rates back home. However, since I do actually live in DC, my permanent residence is not where I reside. Therefore, the issue I am running into is attempting to decipher which address I need to put down when applying to cards. I would obviously prefer to use my DC address, since I do not want my parents to receive statements from the companies or other credit card offers. However, I do not know if credit card companies use permanent legal address to verify identities, nor do I want to do anything that might jeopardize my status with reciprocity. Due to my lack of experience in dealing with credit card companies, I was unsure about which direction to head. Any advice the wonderful people of personalfinance have for me would be greatly appreciated.
<bot>: my legal address is different from my actual residence due to (legal) tax purposes; which address do I use to apply for credit cards