Hi @cgoldsmith5280-g and thanks for your question!
I am assuming your LLC is a Single Member LLC reported on a Schedule C.
TurboTax has a resource hub that allows you to estimate you taxes and tax refund based on your situation.
Here is a link to the free calculators and tools: TurboTax Calculators
The W-4 Calculator seems like the best calculator to use. It allows you to account for your total tax situation, including your pay with current employer, filing status, business income and losses.
Another would be the TaxCaster, which allows you to estimate your tax refund based on simple questions about your life and income.
I hope these help!
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