After you file

I have not got a return yet. When I check irs.gov it says we have accepted your taxes in progress. I did get a letter saying dear taxpayer we received your income tax return and are verifying its accuracy. we selected you return to verify one or more of the following you may have reported. 

-incometax

-income tax withholding

-tax credits

-business income

Will contact you or your authorized representative if we have questions. And at this point do I have to wait until they're done?