I've not tried TT online but you may be better off in the download version of TT where you can certainly see all the forms and worksheets etc before filing/paying anything (but you have to pay for the software but they have a 60 day refund policy). Been using it for 20 years and never had any issue with the calculations.
You can buy the download version direct from TT or certain retailers, recommend the latter as there are some good discounts at places like Amazon right now.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-product-orders/obtain-authentic-t...
Direct TT pricing and download page
https://turbotax.intuit.com/personal-taxes/cd-download/
There are some system requirements however so be sure to check
https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements/
