https://ttlc.intuit.com/community/taxes/discussion/how-did-you-calculate-my-qtrly-est-tax-payments-for-2018-to-be-5-611/01/209079#M85712 My 2017 tax liability is $20,401. I divided that by 4 to get a qtrly est of $5,100.25/qtr. Isn't that acceptable? Sat, 01 Jun 2019 18:05:12 GMT fredmarsha829 2019-06-01T18:05:12Z https://ttlc.intuit.com/community/taxes/discussion/how-did-you-calculate-my-qtrly-est-tax-payments-for-2018-to-be-5-611/01/209079#M85712 My 2017 tax liability is $20,401. I divided that by 4 to get a qtrly est of $5,100.25/qtr. Isn't that acceptable? Sat, 01 Jun 2019 18:05:12 GMT https://ttlc.intuit.com/community/taxes/discussion/how-did-you-calculate-my-qtrly-est-tax-payments-for-2018-to-be-5-611/01/209079#M85712 fredmarsha829 2019-06-01T18:05:12Z https://ttlc.intuit.com/community/taxes/discussion/impossible-for-any-of-us-to-say-go-thru-all-the-calcula/01/209087#M85715 Impossible for any of us to say...go thru all the calculation entries again...but family size, std or Itemized deductions changes for 2018....children go over certain Tax credit age limits...all kinds of stuff....no one really knows how 2018 will shake out with all the changes.&nbsp;&nbsp;(they are included in the estimate calculations)<BR /><BR />IF you don't want to pay it...or think you are correct. just round to 5100 or 5200, for each payment and do that instead....and just use the IRS PDF forms...or pay online....&nbsp;&nbsp;(assuming all your payments are thru quarterly payments with no withholding on w-2 forms).<BR /><BR />&lt;a rel="nofollow" target="_blank" href="<A href="https://www.irs.gov/pub/irs-pdf/f1040es.pdf&quot;&gt;https://www.irs.gov/pub/irs-pdf/f1040es.pdf&lt;/a" target="_blank">https://www.irs.gov/pub/irs-pdf/f1040es.pdf"&gt;https://www.irs.gov/pub/irs-pdf/f1040es.pdf&lt;/a</A>&gt; Sat, 01 Jun 2019 18:05:14 GMT https://ttlc.intuit.com/community/taxes/discussion/impossible-for-any-of-us-to-say-go-thru-all-the-calcula/01/209087#M85715 SteamTrain 2019-06-01T18:05:14Z https://ttlc.intuit.com/community/taxes/discussion/turbotax-uses-100-of-the-taxes-calculated-on-your-curren/01/209095#M85719 <P>TurboTax uses 100% of the taxes calculated on your current year return for the estimated tax payments--<B>110%</B> if your income is over $150,000 ($75,000 if married filing separately).&nbsp; You can always change the method in the <I>Estimated Taxes</I> interview in TurboTax, on the <I>Which Method?</I> screen.&nbsp;<I> [Screenshot #1, below.]</I><BR /></P> Sat, 01 Jun 2019 18:05:14 GMT https://ttlc.intuit.com/community/taxes/discussion/turbotax-uses-100-of-the-taxes-calculated-on-your-curren/01/209095#M85719 IreneS 2019-06-01T18:05:14Z