Hi @fieldman11, the best way to calculate your quarterly estimated taxes is to use IRS Form 1040-ES which can be found here with instructions: https://www.irs.gov/pub/irs-pdf/f1040es.pdf
You may also find this TurboTax article and calculator useful: https://turbotax.intuit.com/tax-tips/small-business-taxes/estimated-taxes-how-to-determine-what-to-p...
