Key already associated with another TT account

[PaulTaxes]

My family bought a 5 return download TT Home&Bus from Costco.  It is a PC version.  Return#1 used the link and key to download it to their PC.  Return#2 (a mac user) used this link https://turbotax.intuit.com/lp/ty19/desktop/access-my-downloads/ to get to a place where they had to enter their TT account, then they got to a link where they could enter the key and get the software.  I am Return#3 (also a Mac user). I cannot seem to find a place where I can get to download link that does not require a TT account entry.  I don’t know the accounts of the two prior users, but when I enter my TT account and try the key, it tells me that the key is assciated with anouther account. How can I get the software?

[Opus 17]

You can try calling customer service.

https://support.turbotax.intuit.com/contact/

But it is not a "5 person" program.  The license allows ONE user to install on computers they own plus make one backup copy.  It can e-file up to 5 returns (IRS limit) but that is not the same as installing it for 5 users.  In other words, if you buy the software your family can give you their info to prepare their returns, but you can't give them the software.

From the license:https://turbotax.intuit.com/corp/license/desktop.jsp

In addition to the General License Grant you may: (I) install and use a copy of the Software on one or more computers owned by you (at home or at work); (ii) use the Software only to prepare, print and/or electronically file federal 2019 tax year returns and related state tax returns as described below; (iii) make one backup copy of the Software for personal use as permitted under this license grant; and (iv) any software that is delivered by electronic transmission (regardless of whether a replacement copy is ordered) shall be deemed delivered on the date that Intuit makes such program available for download.

Additional Restrictions. You are not licensed or permitted under this Agreement to do any of the following: (1) allow any other person to use the Software; (2) rent, loan, resell, distribute, or redistribute the original CD or a copy of the Software to any other person or entity; (3) make the Software available on any file-sharing or application hosting service; (4) electronically send the Software to any other person; (5) copy the printed materials or user documentation accompanying the Software other than as necessary to support the uses permitted above; (6) use the Software for any commercial purpose (i.e., tax return preparation for a fee or other consideration); or (7) use the Software to electronically file more than five federal returns. Any person who received the Software through any of the forgoing prohibited methods, or through any method other than purchasing a license for this Software from Intuit or an Intuit authorized retailer, is not authorized to use such Software.

You are not licensed or permitted to use the Software, or allow the Software to be used, to prepare tax returns, schedules or worksheets on a professional or commercial basis (i.e., for a preparer's or other fee or consideration). Additionally, you must indemnify and defend Intuit against any claims or lawsuits, including (without limitation) attorneys’ fees, that arise from or result from the use of the Software on a professional or commercial basis.