I received a notice from the IRS that I can’t claim dependents or receive EIC this year, I am past the 30 days deadline. It says I owe $7k if I try to amend?

we have no way of knowing why the IRS disallowed the dependents and EIC -

what was the IRS notice number? 

The IRS may send you another notice proposing the taxes you owe. The notice may indicate you must petition the US Tax Court if you disagree.

your choice:

hire a tax pro 

or use

The Audit Defense service is provided by TaxResources, Inc., also called TaxAudit.com, in partnership with TurboTax. If you paid for Audit Defense and you received a notice, call TaxResources, Inc. at 877-829-9695, or report your notice on their website at http://intuit.taxaudit.com/. Do not contact the tax agency until you have spoken to TaxResources. They may contact them on your behalf.

I do not know if they handle the situation you are in.