As it turns out, my employer DID underwithhold my SS taxes, by $6.51. So this is not due to a bug in TurboTax. The IRS announced in August 2020 that employers could defer Social Security taxes from Sept. through Dec. 2020, so that is what my employer did, unbeknownst to me. It was an employer action, not an employee one. But the deferred taxes have to be paid back throughout 2021. Since I no longer work for this employer, I called them and they said I would receive a bill in August for the amount due. Luckily for me, it is not a lot of money. Others may be less fortunate.
