using Turbotax you can not e-file a 2022 or prior return. thus the 8453 can't be used. Everything gets sent with the amended return.
if you are asking about 2023, generally, you can e-file your amended 2023 federal return via TurboTax if your original return was also e-filed in TurboTax. However, there's a chance your return can't be e-filed based on your unique situation. If this happens, you'll need to print and mail your tax return. If it's 2023 and you can e-file, then the 8453 and the 8949s or 1099-Bs whichever contains the required detail of the trades to:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254
Note that the 8453 and attachments are supposed to be mailed within 3 days of accepted e-filed return.
All the other forms and schedules required for the amended return should be included in the e-file. You should get 2 e-mails. one saying submitted and the other saying accepted or rejected. if rejected you'll have to mail everything except the 8453.
I strongly recommend you use a tracking service for anything you mail to the IRS.
