Do I add my 5 year Olds 1099 from his savings account to my income?

If the unearned income from interest is not more than $1,150 the child does not have a reporting requirement. 

It depends. In general, in 2022 the first $1,150 worth of a child's unearned income is tax-free. If your 5-year-old earned less than that, you don’t have to add his saving account interest to your tax return.

If it’s more, fill out a kiddie tax form.

1. Type kiddie tax in Search (magnifying glass) in the top right corner
2. Select Jump to kiddie tax
3. On “Any Child's Income?” say YES and follow the screens

Learn more at What is IRS Form 8615: Tax for Certain Children Who Have Unearned Income.