Why can't I put the zip code code I have entered repeatedly will not take for a investment co., therefore I cant file my tax return. Any help would be appreciated!

Exit the review and go back to the 1099 or whatever form is giving you an error.   It is probably the state code that needs editing.  

Check the 2-letter state code for that zip code.   Make sure the city and state match up to the zip code.  This error happens when the state code doesn't match what is on file with the IRS.  TurboTax follows the IRS for acceptable zip codes.  If the state code does not match the correct state, you will get an e-filing error.   Correcting the state code is usually the fix.  

• Check that the 2 letter state abbreviation is correct here USPS Two–Letter State and Possession Abbreviations   (most common error)
• Make sure you've entered the ZIP code in either 5-digit or 9-digit format, for example, 12345 or 12345-6789.
• Look up the correct ZIP code for the street address in question.