My wife needs to pay estimated tax. She started to work as self-employed in July 2021, so it is the first time she will do it. Also, she never filed any U.S. tax return before. Can she pay estimated tax online? She tried IRS Direct Pay but it needs to identify her using previous year tax return which she doesn't have. However, while trying to pay using credit/debit card (e.g. through PayUSAtax), it doesn't ask for the identification using previous year tax return. Is this a way to go? Or should she sent a money order to IRS instead? Of course, she would prefer paying online.
