What is a "costco purchased turbotax credit"?
Are you asking if you can deduct the amount that you paid for the software at costco?
If so, then please note that this deduction was eliminated by the Tax Cut and Jobs Act of 2017, along with a large number of other Itemized Deductions.
So the answer would be "no", unless you meant something else.
Are you asking to use the license for desktop software when you did not use desktop software?
You appear to be posting from online software instead of the desktop CD/download software that the license code is for. If you are using online, you are using the wrong program. You need to switch to the desktop software to get what you paid for. You have to download it, update it and open it up from your own hard drive to use it.
I am understanding Intuit to say that if you bought TurboTax at Costco they will not apply your money paid to Costco/Intuit against your Online TurboTax account. Apparently just the CD version. This is old school, underhanded and some cold Sh...#1
#2 Since Intuit ripped me off on #1 above I want to point out, and I have been a TurboTax user for 25 years, that they are making the software less intuitive so that you are indirectly driven to their MAX service, and guess what, upsold.
Very Disappointed loyal user.