I need a copy of the address they sent my 2003 tax to. I need to verify that I was at the address they sent it to.

How do I get a copy of what address they sent my 2003 tax chec. I need to verify that I was at this address.

I suggest you call the IRS and ask if they have a record of your mailing address from 2003. Alternatively - if you still have a paper copy of your 1040 tax filing from 2003, it would show your address.