Based on the latest information from IRS on Health Savings Account (HSA), the maximum permitted HSA contribution in 2021 for Jack in his situation is "$3,600."
The Health Savings Account
The IRS made the latest information for 2021 by stating that individuals aged 55 and below without family coverage under qualifying high-deductible health plans not less than $1,400 can contribute up to $3,600.
Therefore, given that Jack is not specified to have family coverage, it is assumed he is operating individual HSA. Also, since he is 45 years old, therefore, the maximum permitted HSA contribution in 2021 for Jack in his situation is "$3,600."
Hence, in this case, it is concluded that the correct answer is "$3,600."
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