Can someone help me enter a foreign zip code? It will not register letters when I enter them.

You didn't say what screen you are referring to, so this answer is in general.

A foreign address doesn't use a zip code.  It uses a postal code.    You have to first tell TurboTax that the "type" of address is a "foreign country address", and then the input fields will change and have a box for "postal code."

Look higher up on that screen for "type of address", and in the dropdown menu associated with that box choose "foreign."

To expand on what was written by mesquitebean, here are some screen illustrations that may be useful to you.

When you begin entering information about yourself, you will reach a screen that is illustrated below. Here select Foreign or US territory.  Don't worry, this is a hypothetical return for illustrative purposes only.

When you record your mailing address, you, this is how you would enter.  Make sure the foreign address is checked at the top and the foreign country selected in the drop down.

@rbjasper12 

I keep getting stuck in this doom loop where I keep getting asked to review my information regarding school state and zip code. It is a foreign school, and I did make sure to label it as foreign in the first page, but it keeps asking me to put US state and zip code which does not make sense. I cannot complete the last part which is filing. 

On which screen are you getting stuck?  There are some screens, such as the payment screen, that do not accept a foreign address.   For others, you must first select "Foreign or US Territory" in the state drop down box.  

I am getting stuck on the review part where it tells me to put a valid US state and zip code even though my educational institution is foreign. I can just complete the review, but then I cannot complete the filing page. 

This sounds like  the information is coming from the Education Expenses section of TurboTax.  Return to that area under Deductions & Credits and answer "yes" to the question about if your school has a foreign address, then complete the information on that screen.  

It should look similar to this

I did do that and still does not work. I have tried deleting and adding it again as well and for some reason it still does not work. 

Try a series of five 1s (11111) for the zip code to see if this will resolve the error.  This isn't a field that is critical when filing and this may allow you to get the return filed, and then we can investigate the issue.  If there is a software issue, it won't be resolved by tomorrow and the series of 1s will allow you to get your return filed.  

To investigate further, I need a diagnostic file which is a copy of your tax return that has all of your personal information removed. You can send one to us by following the directions below:

TurboTax Online:

1. Sign into your online account.
2. Locate the Tax Tools on the left-hand side of the screen.
3. A drop-down will appear. Select Tools
4. On the pop-up screen, click on “Share my file with agent.”
5. This will generate a message that a diagnostic file gets sanitized and transmitted to us.
6. Please provide the Token Number that was generated in the response.    A screenshot is ideal.

TurboTax Desktop/Download Versions:

1. Open your return.
2. Click the Online tab in the black bar across the top of TurboTax and select “Send Tax File to Agent” *
3. This will generate a message that a diagnostic copy will be created.  Click on OK and the tax file will be sanitized and transmitted to us.
4. Please provide the Token Number (including the dash) that was generated in the response.  A screenshot is ideal.

*(If using a MAC, go to the menu at the top of the screen, select Help, then, “Send Tax File to Agent”)

I was able to get on a call with someone from Turbotax and resolved the issue. When it came to deleting the student form I had to go into the Tax Tools part and delete any forms/documents related to educational expenses. Then start over. This seems to have done the trick. 

Great, I am glad that worked for you.  Thank you for letting me know!