You mean the 16 digit License code? Did you originally install it from the CD or the download?
Even though you can install it 5 times, it seems you can only use the CD 1 time unless you install it on another computer using the other operating system like Mac. And if you installed from the CD it seems you can not download it from online. You can't do both CD and download. See the info on this FAQ
Or try copying the CD to a usb flash drive. See SteamTrains post here
If you are installing the TurboTax software on a computer you have to use the License code that was issued for the software when installing.
See this TurboTax support FAQ for the License code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/find-license-code/L4GHDgGpr_US_en_US
How to install the software with the License code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-download-software-license-code/L1wFOSXur_US_en_US
If you are using the TurboTax online web-based editions you Must sign onto the TurboTax account using the exact same User ID and Password you used to create the online account - https://myturbotax.intuit.com/
What PIN are you referring to?
The Identity Protection PIN sent to you by the IRS? - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/add-remove-6-digit-ip-pin/L1cz7f2zQ_US_en_US
The 5 digit self-selected PIN when e-filing a tax return?
The 6 digit verification code sent to you by TurboTax? - https://ttlc.intuit.com/turbotax-support/en-us/help-article/security-risk/trouble-filing-verification-code/L6X76gZlE_US_en_US
Not really sure what is being reference here. Typically a PIN is 4-8 digits long. There are two types used when e-filing a return.
- The 5-digit PIN is your "signature" on your tax return. This PIN does not change unless the tax filer takes action to change it.
- The 6-digit PIN is a separate identity verification number issued by the IRS. This PIN "will* change every year. The IRS mails the PIN number to the tax filer every year, to the address on the last tax return that was e-filed, or to the address on IRS Form 8822 - Change of Address, if one was filed since the last tax return was filed.
- The 16-character license code required to install the CD version of TurboTax can be a mix of letters and numbers in four 4-digit groups. This is also referred to as the activation code. If this is the issue, check that your CAPS LOCK key is not on. Otherwise, digits entered may be entered as symbols if using the top row of the keyboard. Check that NUM LOCK is on if using the separate number pad to the right of the main keyboard.