The CP75 is an audit notice regarding the tax return on which an Earned Income Credit was claimed. Here's a link to the IRS page which discusses the CP75: https://www.irs.gov/individuals/understanding-your-cp75-notice.
In the notice, IRS will give you specific instructions on how to provide the documentation they're seeking.
If you purchased Audit Defense, then you should contact the Audit Defense support agents prior to responding to IRS. Here's a link to the TurboTax audit support page, with contact information for Audit Defense: https://support.turbotax.intuit.com/irs-notice/audit-support/
This is what i hate,they always forget to write back to let us know what happened.
its still not cleared up. audit defense is [profanity removed]
Got the same letter back in Feb and sent what they wanted and here it is the last day of May and still haven't heard anything
Hi, I’m also waiting to hear back from the the IRS. If anyone has any new developments, please share, I’ll do the same.
We talked to.our TA today and she said we will have a date for our refund by the 28th of June. So fingers crossed