If you received a prize, then it would be taxable income even if you felt it was a gift. Keep the 1099-K in your tax file should you need it later.
Without additional information the income can be reported as follows without actually entering a 1099-K.
The money was a gift from my Mom, I thought if the amount was under a certain amount that I would not need to report it.
‘thank you for any advice you may have
Yes, with the additional information you provided, you are correct that you will not be taxed on the receipts from your 1099-K. If the gift was from your mother (note if it was more than $18,000 your mother may need to file a gift return), then it isn't taxable income. 1099-Ks aren't required over $5,000, but can be provided anyway.
You can indicate this in TurboTax Online when you enter your 1099-K. Choose the option "This amount in box 1a is too high, and enter the amount of the gift. For example if the 1099-K shows $1,000 in box 1a, report the $1,000 in box 1a, check the box that the amount is too high, and enter the full $1,000 as the amount that shouldn't be included.