@1988-dj
You asked: "How much will I get if I file without a child dependent?"
Get for what? No one in a public user community forum can see your return or know anything about your income, deductions, withholding, tax credits, or anything.
You can try the TurboTax TaxCaster tool, for a quick overview and estimate:
https://turbotax.intuit.com/tax-tools/calculators/taxcaster/