I responded with my documents to an audit letter. The next letter i received said my documents would be reviewed by 7/16 , still no word or letter .what should i do next?

You just wait.   The IRS is severely backlogged.   A review must be done by a human.   You can watch the IRS refund site for information.   It might take months for them to complete the review.   TurboTax does not receive any information from the IRS after you file your tax return, so no one at TurboTax knows you received a letter from the IRS, nor can anyone at TurboTax speed up the IRS for you.   Your only source of information is the IRS.

You need your filing status, your Social Security number and the exact amount  (line 35a of your 2021 Form 1040) of your federal refund to track your Federal refund:   

https://www.irs.gov/refunds

To call the IRS:IRS:  800-829-1040  hours 7 AM - 7 PM local time Mon-Fri

Listen to each menu before making the selection.

First choose your language. Press 1 for English.

Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.

Instead, press 2 for "personal income tax".

Then press 1 for "form, tax history, or payment".  

Then press 3 "for all other questions."

Then press 2 "for all other questions."  It should then transfer you to an agent.