That worksheet is an internal TurboTax worksheet and not an IRS form. Both the 2020 1040 instructions and Schedule A instructions are still in the draft state at the IRS, so until they are complete and released, the IRS will not release the form electronic specifications (schemas) that tax software is programed from so that it is compatible with the IRS computers.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
