Retirement tax questions

1. Yes, if you have fully paid and reported Social Security and Medicare tax, you can disregard the W-2C alert. 
    
2. Yes, you are correct. Form W-2C is for wages and would have nothing to do with Form 1099-NEC.
    
3. Regarding your deferral of SE Tax, this has likely occurred because initially, before you were in a refund situation, the tax could be deferred. However, when all the details were added, you were no longer eligible for the deferral. 
   1. There is a workaround for this so that you will get to the screen to turn off the deferral. Follow these steps:
      1. Enter a temporary amount as income in the self-employment section that will result in you not having a refund.
         1. From the left menu, select Federal.
         2. From the Income & Expenses, scroll to Self-employment income & expenses and Edit/Add.
         3. At Your 2020 work summary, select Edit.
         4. Under INCOME, select Add income for this work.
         5. Add Other self-employed income, includes 1099-K, cash, and checks and Continue.
         6. At Type of income, enter Temp income to remove deferral and enter a large amount, such as $100,000 and Continue.
             
      2. Decline to defer any self-employment tax.
         1. From the left menu, click on Federal.
         2. Click the second tab from the left, Deductions & Credits.
         3. Scroll down to Tax Relief related to Covid-19 and Revisit.
         4. Select Self-employment tax deferral and select Revisit.
         5. Answer Yes at the next screen to get back to Let's start by getting your eligible income.
             
         6. ​​​​​​​Enter 280/366ths of your income to reflect the income from March 27-December 31, 2021. 
            1. This amount should be the same as the correct amount on Line 18 of Sch SE.
         7. Select Continue.
         8. At Tell us how much you'd like to defer, 
            1. Enter 0.​​​​​​​
      3. Remove the temporary income.
         1. ​​​​​​​From the left menu, select Federal.
         2. From the Income & Expenses, scroll to Self-employment income & expenses and Edit/Add.
         3. At Your 2020 work summary, select Edit.
         4. Under INCOME, select the Trash can icon next to Temp income to remove deferral and Continue.
   2. For more details, see TurboTax Expert @DawnC's answer here, about 2/3 down the page: Resolve Sch SE-T Max Deferral Line 18 must be entered.
4. Regarding Form 2210, try deleting it after the changes described above. Then, run through the review again to make sure everything is fully updated.
   1. See: How do I view and delete forms in TurboTax Online?
   2. How do I add Form 2210?
5. Yes, Form 1099-NEC should be linking to Schedule C so that Schedule SE is generated. With the significant changes impacting individual income tax with COVID-19 legislation and other very late changes at the federal and state levels, there are many aspects people would have no reason to realize unless it impacted them directly.

@brennandog

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