My tax return has been pending since May and I still haven't received it. It says it's been approved and everything. It is now September 12th and nothing yet has come.

[xmasbaby0]

Where are you seeing the word "approved?"   Unless you are seeing the word "approved" on the IRS refund site, your refund has not been approved.   TurboTax only tells you that your return has been "accepted"--never that it has been "approved."

https://ttlc.intuit.com/questions/2840013-does-accepted-mean-my-refund-is-approved

If the IRS says it has been approved and issued, then did you choose to pay your TurboTax fees from your federal refund?  If so, sort it out with the third party bank that handles refund processing.

What is Refund Processing Service?

Santa Barbara Tax Products Group, LLC  (SBTPG) is the bank that handles the Refund Processing Service when you choose to have your TurboTax fees deducted from your refund. This option also has an additional charge from the bank that processes the transaction. 

You can contact them SBTPG, toll-free, at 1-877-908-7228 or go to their secure website www.sbtpg.com 

https://ttlc.intuit.com/questions/2580357-who-provides-the-refund-processing-service

[DoninGA]

If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds

After the tax return has been Accepted by the IRS (meaning only that they received the return) it will be in the Processing mode until the tax refund has been Approved and then an Issue Date will be available on the IRS website.
See this IRS website for federal tax refund FAQ's - https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions

Call the IRS: 1-800-829-1040 hours 7 AM - 7 PM local time Monday-Friday
When calling the IRS do NOT choose the first option re: "Refund", or it will send you to an automated phone line.
So after first choosing your language, then do NOT choose Option 1 (refund info). Choose option 2 for "personal income tax" instead.
Then press 1 for "form, tax history, or payment".
Then press 3 "for all other questions."
Then press 2 "for all other questions."
- When it asks you to enter your SSN or EIN to access your account information, don't enter anything.
- After it asks twice, you will get another menu.

Press 2 for personal or individual tax questions.
Then press 3 for all other inquiries
It should then transfer you to an agent.

[Bsch4477]

Keep checking with the IRS. TurboTax gets no information about your return after it is filed. 
https://www.irs.gov/wheres-my-refund