your income by quarter is not what Turbotax needs
for estimate tax requirements it's income and deductions for the first 3 months, then the first 5, then the first 8, and finally the whole year (automatic from the return)
and you are correct that Turbotax does not really provide for that varying income
however, in the estimated tax options section, you can check either 90% or 100% of the esyimated 2022 tax but you have to calculate this
there is a section Estimated Taxes and Form W-4 Worksheet
there is a 2022 expected column so you would need to annualize the amounts for each of the periods. don't forget about the self-employment tax section.
for the first 3 months multiply by 4 each item of income (net schedule c, interest, dividends, qualified dividends and other items of income and deductions (other than expenses reported on schedule c) and items of income or deductions subject to limitation (such as HSA, IRA schedule A tax deduction, mortgage interest - you can only annualize up to their limit
5 months multiply by 12/5
8 moths multiply by 12/8
the full year is automatic
once the annualized taxes are calculated you de-annualize the total taxes by
3 months multiplying by 1/4
5 months - 5/12
8 months - 8/12
12 months automatic
now you have the cumulative taxes that need to be paid in for each period. form those you subtract amounts paid for prior periods
making uneven estimated tax payments may require you to complete the Annualized Income section of form 2210 otherwise Turbotax computes penalties based on 1/4 of the total tax being due each period and from that subtracting timely estimated tax payments.
the main issue with using the 90%/100% 2022 tax requirement is law changes that can affect the amounts and leave you owing penalties.
also the
as you can see the AI method can be complicated in getting to the correct numbers if you have other than a very simple return.
