Hello,
If a taxpayer has a guaranteed installment agreement and they end up owing a modest underpayment penalty for not paying estimated tax, is this generally cause for default as seemingly hinted under "How the Installment Agreement Works"? Once the return is filed and paid, presumably the "tax obligation for future years is paid in full when payment is due", unless that technically includes paying estimated tax payments on time. Just a bit vague. Opinions? Thanks!
