@Kerry
You wrote: "I need to access and file my 2017 taxes."
I revised the answer above since I saw belatedly that you have not yet filed the 2017 return and still plan to file it.
Once we tell you the steps to pay for PLUS and get access to your 2017 return PDF and tax data file, if it is completely finished and nothing else needs to be done to it, you can print and mail the return. If there are both Federal and state returns, you mail each one separately to the respective tax agencies. It's a good idea to mail by a method that has tracking, such as certified return receipt, priority mail, etc.
If you need to finish or make changes to anything in the 2017 return, that can only be done with 2017 desktop software. You can purchase 2017 desktop software as a download at this page and install it on your computer:
https://turbotax.intuit.com/personal-taxes/past-years-products/
Minimum system requirements for Windows version:
https://ttlc.intuit.com/questions/1901571-minimum-system-requirements-for-turbotax-windows-software
Minimum system requirements for Mac version:
https://ttlc.intuit.com/questions/1899173-minimum-system-requirements-for-turbotax-mac-software
If you are due a Federal refund, it takes about 6 weeks for the IRS to process a mailed return.
