the default method for computing underpayment penalties is to assume 1/4 of your annual tax is due each period. For the full year, your annual tax payments due is the lower of either 90% of your current year tax or 100% (110% if 2022 tax if that year's adjusted gross income was over $150K) but as stated 1/4 must be paid in for each period. Therefore, it is possible that under the default method, you could be subject to penalties. The only way around this is to calculate your taxes for each period using the annualized income installment method (AIIM) on page 3 of the 2210.
****************
under the AIIM taxes are computed by annualizing income net of deductible expenses for each period, computing the taxes thereon, and then de-annualizing the tax. tax payments for each period must equal or exceed the calculated tax.
**********************i
if there are penalties and you never requested a waiver in other years you could request a waiver. This is a one-time thing.
