I can't fill in line 24z on schedule 1 (Adjustments to Other income) How do I open a smart worksheet for that line to fill it in?

Consider reporting IRS form 1099-K with items for personal use by following the steps below.

The posting of IRS form 1099-K for personal item sales is a two-step process.  

• First, you post the IRS form 1099-K amount of box 1a.  
• Second, you post the IRS form 1099-B Proceeds  From Broker and Barter Exchange Transactions to report the sales proceeds and the cost of sales.

Make sure that the amount reported on the IRS form 1099-K box 1a equals the Proceeds reported for the multiple entries of IRS form 1099-B.

In TurboTax Online, to report Personal item sales, follow these directions.

• Down the left side of the screen, click Federal.
• Down the left side of the screen, click Wages & Income.
• Click the drop down arrow to the right of Other Common Income.
• Click to the right of Form 1099-K.
• At the screen Did you get a 1099-K?, select Yes.
• At the screen How would you like to upload your 1099-K? click Type it in myself. 
• At the screen Which type of income is your 1099-K for, select the button for Personal item sales.  Click Continue.
• At the screen Let's get the info from your 1099-K, enter the information.  Click Continue.
• At the screen Personal Item Sales, click Continue.
• At the screen Your 1099-K summary, notice that the income relates to ‘Personal Items’.  Click Done.
• At the screen Your income and expenses, scroll down to Investments and Savings (1099-B, 1099-K….).  Click the down arrow.
• To the right of Stocks, Cryptocurrency, Mutual Funds, Bonds, Other (1099-B), select Start/Revisit.
• At this screen, you will be asked to Review the Personal item sales (1099-K).  Click Review.
• At the screen Now, enter one sale…., answer questions about the personal item sale.  Click Continue.
• At the screen, Let us know if any of these situations apply to this sale, sales expenses may be recorded.
• Select Add another sale as needed.

The entry will be reported:

• on Schedule D of the Federal 1040 tax return, and 
• on line 7 of the Federal 1040 tax return.

Capital loss for a personal item sale reports $0 capital gain on line 7 of the Federal 1040 tax return.

@Bill347