I do not usually pay estimated taxes; I withhold enough from my day job to cover my investment income and small side business. However I got an extra job that was large enough that I want to pay several thousand in estimated taxes.
1) I don't really want to fill out forms and mail a check if I can help it. Can I just send the IRS a check from my automated bill pay, listing my SSN as the "Account number," and assume they will be able to match it up at year-end when I claim that I paid $x thousand in estimated tax? 2) I would like if possible to pay with a credit card. (I've already determined that the convenience fee is worthwhile.) However, I saw somewhere that you cannot pay estimated taxes this way, only taxes due with your return. Is this true?Thanks.