Need assistance with filing an extension. want to know know how to figure taxes owed using new tax code and constant income?

[GaryG1]

TurboTax Easy Extension can help you submit your extension including calculating your tax refund\owed:  https://turbotax.intuit.com/irs-tax-extensions/

You can also use the stand-alone TaxCaster Calculator: https://turbotax.intuit.com/tax-tools/calculators/taxcaster/