A Capital Loss Carryover from investments? From 2019 or to 2021?
The current year carryover loss from the prior year is on schedule D line 6 & 14.
On the income page The 2020 column shows the carryover to 2021 (not your current loss for 2020). Schedule D doesn't actually show the carryover amount. To find your Capital Loss Carryover amount you need to look at your return schedule D page 2. Line 16 will be your total loss and line 21 should be a max loss of 3,000. The difference between line 16 and 21 is the carryover loss for next year.
There is also a Carryover Worksheet showing the carryover from the prior year and the current amounts. Then there is also the Capital Loss Carry Forward worksheet showing the amount transferring over to next year.
In the Online version you have to save your return with all the worksheet as a pdf file to your computer to see the Capital Loss Carry Over and Carry Forward worksheets.
In the Desktop program you can go to Forms and find it in the list in the left column.
If you have a negative AGI or negative taxable income it will show up on 1040 BUT it won't reduce the carryover to the next year.
What do you mean "tax loss"?
Did you mean Capital Loss?
Your long term Capital Loss carry over from 2019 to 2020 would be on your 2019 "Capital Loss Carry Forward Worksheet" line 13 and would be carried to the 2020 "Capital Loss Carryover Worksheet" and go on the 2020 Schedule D, line 14.
How to get a copy after filing
Here's an alternate way to print by opening the filed return back up to print at the Print Center, where you can also get the worksheets.
Log in and at the Tax Home or in the section Your Tax Returns & Documents for 2020, look for a link Add a State. Click on Add a State. (you don't really add one. That's just to open your return back up.)
After the return is open, click in the left menu column on TAX TOOLS, then PRINT CENTER.
Then choose Print, save, view this year's return.
The next screen should offer some options: Just my tax returns or include government worksheets (optional), or include government and TurboTax worksheets (optional.)