You should be excited they want to see your transcripts. That should pave the way to higher CLIs in the future. And as far as them seeing your itemized deductions, I'm not sure why that matters, but either way that's not how transcripts work. Have you seen an IRS transcript? It's not a copy of your tax returns.
Beggars can't be choosers and 2 years post BK is not the time to close your best card out of spite.
FYI, you would have been better served by having the CU send you the check and you pay off the balance from your regular account.