we have received your income tax return and are verifying

I received a letter after my return was accepted saying "We selected your return to verify one or more of the following"

income/income tax withholding/tax credits/business income

You don't need to do anything at this time.

What gives? It says it could be 60 days and not to contact them until then. It's not just a refund, it's money I earned that is being refunded. I'd like it. 

Anyone else have this issue?