if you don't itemize and can't be claimed as a dependent on someone else's return you'll get the maximum standard deduction $12, 400 for 2020. what makes up your income is irrelevant.
for 2020 for income between about $40,100 and $85,500 you pay 22% (marginal tax rate) in federal taxes
federal 900*.22 = 198 your state tax is 900*.0553= 50
don't know how you came up with $108 that's 12% on $900
